APA-referens (7:e uppl.)

Filfus, N. (1928). Principles and exercises in accounting. Globe Book Company.

Chicago-referens (17:e uppl.)

Filfus, Nathaniel. Principles and Exercises in Accounting. New York: Globe Book Company, 1928.

MLA-referens (8:e uppl.)

Filfus, Nathaniel. Principles and Exercises in Accounting. Globe Book Company, 1928.