APA (7th ed.) Citation

Tylor, A., & Skertchly, S. B. J. (2014). Colouration in Animals and Plants. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tylor, Alfred, and Sydney B. J. Skertchly. Colouration in Animals and Plants. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Tylor, Alfred, and Sydney B. J. Skertchly. Colouration in Animals and Plants. Project Gutenberg, 2014.

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