Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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