APA (7th ed.) Citation

Duncan, N. (2010). Higgins A Man's Christian. Project Gutenberg.

Chicago Style (17th ed.) Citation

Duncan, Norman. Higgins A Man's Christian. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Duncan, Norman. Higgins A Man's Christian. Project Gutenberg, 2010.

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