APA-referens (7:e uppl.)

Ely, R. T. (1901). An introduction to political economy (New and rev. ed.). Eaton & Mains.

Chicago-referens (17:e uppl.)

Ely, Richard Theodore. An Introduction to Political Economy. New and rev. ed. New York: Eaton & Mains, 1901.

MLA-referens (9:e uppl.)

Ely, Richard Theodore. An Introduction to Political Economy. New and rev. ed. Eaton & Mains, 1901.