Gaya APA

Harris, M, M. (1981). The commissions are bigger! The Bonuses are higher! A guide to selling big-ticket goods and services . United States of America: Dow Jones-Irwin.

Gaya MLA

Harris, M., Milton. "The commissions are bigger! The Bonuses are higher! A guide to selling big-ticket goods and services". United States of America: Dow Jones-Irwin, 1981. Text.