APA (7th ed.) Citation

Lynch, J. D., & Freeman, H. L. (2010). Systematic Status of a South American Frog, Allophryne ruthveni Gaige. Project Gutenberg.

Chicago Style (17th ed.) Citation

Lynch, John D., and Howard L. Freeman. Systematic Status of a South American Frog, Allophryne Ruthveni Gaige. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Lynch, John D., and Howard L. Freeman. Systematic Status of a South American Frog, Allophryne Ruthveni Gaige. Project Gutenberg, 2010.

Warning: These citations may not always be 100% accurate.