APA-referens (7:e uppl.)

Combe, G., & Boardman, A. (1874). Lectures on phrenology (3rd ed., with corrections and additions.). Samuel R. Wells.

Chicago-referens (17:e uppl.)

Combe, George, och Andrew Boardman. Lectures on Phrenology. 3rd ed., with corrections and additions. New York: Samuel R. Wells, 1874.

MLA-referens (8:e uppl.)

Combe, George, och Andrew Boardman. Lectures on Phrenology. 3rd ed., with corrections and additions. Samuel R. Wells, 1874.