Dyfyniad APA

Kotler, P. (1988). Principles of marketing. New Delhi: Prentice-Hall.

Dyfyniad Arddull Chicago

Kotler, Philip. Principles of Marketing. New Delhi: Prentice-Hall, 1988.

Dyfyniad MLA

Kotler, Philip. Principles of Marketing. New Delhi: Prentice-Hall, 1988.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.