Kotlar, P., & Agnihotri , P. Y. . . . . A. ,. . . . . . . . . H. (1991). Principles of Marketing. phi.
Chicago Style aipamenaKotlar, Philip, and Prafulla Y. Armstrong ,Gary Haque Agnihotri. Principles of Marketing. new delhi: phi, 1991.
MLA aipamenaKotlar, Philip, and Prafulla Y. Armstrong ,Gary Haque Agnihotri. Principles of Marketing. phi, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.