APA-referens (7:e uppl.)

HELMKAMP, IMDIEKE, & SMITH. (1986). Principles of accounting.-- ed.2. John Wiley and Sons.

Chicago-referens (17:e uppl.)

HELMKAMP, IMDIEKE, och SMITH. Principles of Accounting.-- Ed.2. New York: John Wiley and Sons, 1986.

MLA-referens (9:e uppl.)

HELMKAMP, et al. Principles of Accounting.-- Ed.2. John Wiley and Sons, 1986.