APA (7th ed.) Citation

Setzer, H. W., & Hoffmeister, D. F. (2011). The Postnatal Development of Two Broods of Great Horned Owls (Bubo virginianus). Project Gutenberg.

Chicago Style (17th ed.) Citation

Setzer, Henry W., and Donald Frederick Hoffmeister. The Postnatal Development of Two Broods of Great Horned Owls (Bubo Virginianus). Project Gutenberg, 2011.

MLA (9th ed.) Citation

Setzer, Henry W., and Donald Frederick Hoffmeister. The Postnatal Development of Two Broods of Great Horned Owls (Bubo Virginianus). Project Gutenberg, 2011.

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