These citations use slight modifications of Turabian Scientific Style, as formatted by The University of Chicago Press.
To cite the EOL site as a whole:
Encyclopedia of Life. Available from http://eol.org. Accessed 15 July 2018.
To cite the EOL concept:
Parr, C. S., N. Wilson, P. Leary, K. S. Schulz, K. Lans, L. Walley, J. A. Hammock, A. Goddard, J. Rice, M. Studer, J. T. G. Holmes, and R. J. Corrigan, Jr. 2014. The Encyclopedia of Life v2: Providing Global Access to Knowledge About Life on Earth. Biodiversity Data Journal 2: e1079, doi:10.3897/BDJ.2.e1079
To cite data downloaded from EOL:
If you use EOL as a data source for a scientific paper, please be sure to cite the original source of the data and any references that are provided to support individual values. For most data records, citations and references will be included in the data download file, or you can access them along with other metadata by clicking on the data record in the Data tab of the EOL taxon page. For example, if you used this wood density value for Zanha africana, you would want to include the following citations in your list of references:
Chave J, Coomes D, Jansen S, Lewis SL, Swenson NG, Zanne AE (2009) Towards a worldwide wood economics spectrum. Ecology Letters 12: 351-366. doi:10.1111/j.1461-0248.2009.01285.x
Goldsmith, B. and D.T. Carter. 1981. The indigenous timbers of Zimbabwe. The Zimbabwe Bulletin of Forestry Research No. 9:x, 406 pp.Zanne AE, Lopez-Gonzalez G, Coomes DA, Ilic J, Jansen S, Lewis SL, Miller RB, Swenson NG, Wiemann MC, Chave J (2009) Data from: Towards a worldwide wood economics spectrum. Dryad Digital Repository. doi:10.5061/dryad.234
Citing EOL as the data supplier is appreciated but not required.
To cite an EOL article:
As with most web pages, EOL pages change over time, and different versions of EOL pages are not archived. Therefore, you should only cite individual article providers rather than an entire EOL page.
The provider of an article may have provided a suggested citation. Alternatively, you can build a citation from the taxon page and the information provided on the article. Include the author if named, the taxon name, the article title or section header, the partner project, the date you viewed it, and EOL page URL, filtered by that provider, e.g.:
de Magalhaes, J. P. 2019. "Enhydra lutris: Lifespan, Longevity and Aging." In Anage articles. Accessed 15 July 2019, available from Encyclopedia of Life, https://eol.org/pages/46559130/articles?resource_id=552