APA (7th ed.) Citation

Duff , C. (1937). This human nature: A history, a commentary, an exposition. Watts & Co.

Chicago Style (17th ed.) Citation

Duff , Charles. This Human Nature: A History, a Commentary, an Exposition. Watts & Co, 1937.

MLA (8th ed.) Citation

Duff , Charles. This Human Nature: A History, a Commentary, an Exposition. Watts & Co, 1937.

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