Gaya APA

Russell, F, A, D. (1978). Grolier business library: Textbook of salesmanship . United Stated of Amerika: Mc Graw Hill.

Gaya MLA

Russell, Frederic, A.,, Dkk. "Grolier business library: Textbook of salesmanship". United Stated of Amerika: Mc Graw Hill, 1978. Text.