Gaya APA

Callen, B. (2009). Managers Guide to Marketing, Advertising, and Publicity (Briefcase Books Series) (1). United States of America: McGraw-Hill Companies.

Gaya MLA

Callen, Barry. "Managers Guide to Marketing, Advertising, and Publicity (Briefcase Books Series)". 1 United States of America: McGraw-Hill Companies, 2009. Text.