APA (7th ed.) Citation
Stone, B., Villamizar Herrera, J., & Serna Gómez, H. (1989). Manual de mercadeo directo. Legis.
Chicago Style (17th ed.) Citation
Stone, Bob, Jesús Villamizar Herrera, and Humberto Serna Gómez. Manual De Mercadeo Directo. Colombia: Legis, 1989.
MLA (9th ed.) Citation
Stone, Bob, et al. Manual De Mercadeo Directo. Legis, 1989.
Warning: These citations may not always be 100% accurate.