APA (7e ed.) Bronvermelding

McDonald, W. (1910). The principles of moral science: An essay (2d ed., rev. and enl.). M.H. Gill.

Chicago (17e ed.) Bronvermelding

McDonald, Walter. The Principles of Moral Science: An Essay. 2d ed., rev. and enl. Dublin: M.H. Gill, 1910.

MLA (8e ed.) Bronvermelding

McDonald, Walter. The Principles of Moral Science: An Essay. 2d ed., rev. and enl. M.H. Gill, 1910.