Kotler, P. (1983). Principles of marketing (2nd ed.). Prentice-Hall.
Chicago Style (17th ed.) ZitazioaKotler, Philip. Principles of Marketing. 2nd ed. London: Prentice-Hall, 1983.
MLA (9th ed.) ZitazioaKotler, Philip. Principles of Marketing. 2nd ed. Prentice-Hall, 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.