Let's use the unified reference style when citing the references. There are many styles, and different journals often require different styles. Since we are centred around vegetation ecology, let's keep using the style which is used by Journal of Vegetation Science and Applied Vegetation Science, the leading vegetation ecology journals. The details of this style are in Authors Guidelines e.g. here (section References).
Below is the text copied and modified from the Authors Guidelines published at the website of the Journal of Vegetation Science. References should be prepared in the APA style (Publication Manual of the American Psychological Association, 6th edition)
In-text citations (those citations in the main text or on the slides) should follow the author-date method. One work by one author should be cited as:
When a work has two authors, cite both names every time you reference the work in the text. When a work has three to five authors cite all the author names the first time the reference occurs and then subsequently include only the first author followed by et al. For example:
Unpublished sources should be indicated as ‘unpubl.’ or ‘pers. comm.’ (the latter with date and description of the type of knowledge, e.g. ‘local farmer’). Submitted papers may be cited only if they are in some journal's editorial process.
The References section (in the end of the manuscript or in the final slide of presentation) should provide a complete reference list ordered alphabetically by name at the end of the paper. For references with up to seven authors, all authors are listed. If there are eight or more authors, only the first six and the last one are listed, while the others are replaced by ‘...’. Always give the full name of the journals. Please note that for journal articles, issue numbers are not included unless each issue in the volume begins with page 1, and a DOI should be provided for all references where available.
Reference examples follow:
References in other languages than English
References in the languages that use the Latin alphabet are cited in the original language. Optionally, titles of papers, book chapters of books can be followed by an English translation in square brackets. Titles of the journals or books in the citations of book chapters are not translated. The use of translations should be consistent within each paper (e.g. for all citations in the paper, or all citations in less known languages translated and all citations in widespread languages not translated).
References in the Cyrillic and Greek alphabets are cited in the original language but transliterated to Latin alphabet. Optionally, titles of papers, book chapters of books can be followed by an English translation in square brackets. Titles of the journals or books in the citations of book chapters are not translated. At the end of the citation, the original language is indicated in square brackets.
References in the languages that use other alphabets than Latin, Cyrillic and Greek: Titles of papers/chapters/books including book titles in the citations of chapters and also the titles of the journals are translated to English. At the end of the citation, the original language is indicated in square brackets.