Gaya APA

Tharp, L. (1989). The complete manager's guide to promotional merchandise: promoting your organization with premiums, freebies, and other strange but powerful objects . Homewood: Dow Jones-Irwin.

Gaya MLA

Tharp, Louis. "The complete manager's guide to promotional merchandise: promoting your organization with premiums, freebies, and other strange but powerful objects". Homewood: Dow Jones-Irwin, 1989. Text.