Gaya APA

Harris, M, M. (1981). The Commissions are Bigger! The Bonuses are Higher! A Guide to Selling BIG Ticket Goods and Services . Illinois: Dow Jones-Irwin.

Gaya MLA

Harris, Milton, M.. "The Commissions are Bigger! The Bonuses are Higher! A Guide to Selling BIG Ticket Goods and Services". Illinois: Dow Jones-Irwin, 1981. Text.