Gaya APA

Kahn, G, N., Haryani, Y, S. (1982). 36 Kesalahan terbesar para penjual. The 36 biggest mistakes salesman make and how to correct them. (1982). : Jakarta : Gramedia,.

Gaya MLA

Kahn, George, N.., Haryani, Yulia, Sri. "36 Kesalahan terbesar para penjual. The 36 biggest mistakes salesman make and how to correct them.". 1982 : Jakarta : Gramedia,, 1982. Text.