Estupigon, R. (1999). Sales promotions: Essential tools of the trade. Kabayan.
Chicago Style (17th ed.) CitationEstupigon, Ruth. "Sales Promotions: Essential Tools of the Trade." Kabayan 1999.
MLA (9th ed.) CitationEstupigon, Ruth. "Sales Promotions: Essential Tools of the Trade." Kabayan, 1999.
Warning: These citations may not always be 100% accurate.