APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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