Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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