Gaya APA

H., R, A., Buskirk,Ph.D, R, H. (1978). Textbook of salesmanship . United States Of America: McGraw-Hill,Inc..

Gaya MLA

H., Russell,Frederica, A..Beach,Frank., Buskirk,Ph.D, Richard, H.. "Textbook of salesmanship". United States Of America: McGraw-Hill,Inc., 1978. Teks.