APA (7e ed.) Bronvermelding

Earhart, W. (1962). A steadfast philosophy: A selection of papers written by Will Earhart dating from 1914. s.n.

Chicago (17e ed.) Bronvermelding

Earhart, Will. A Steadfast Philosophy: A Selection of Papers Written by Will Earhart Dating from 1914. [Washington: s.n, 1962.

MLA (9e ed.) Bronvermelding

Earhart, Will. A Steadfast Philosophy: A Selection of Papers Written by Will Earhart Dating from 1914. s.n, 1962.