APA (7th ed.) Citation

Johanssen, O. A., & Riley, W. A. (2010). Handbook of Medical Entomology. Project Gutenberg.

Chicago Style (17th ed.) Citation

Johanssen, Oskar Augustus, and William Albert Riley. Handbook of Medical Entomology. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Johanssen, Oskar Augustus, and William Albert Riley. Handbook of Medical Entomology. Project Gutenberg, 2010.

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