Dyfyniad APA

KOTLER, P. (1999). Principles of marketing ed.8Philip Kotler, Gary Armstrong. Prentice-Hall.

Dyfyniad Arddull Chicago

KOTLER, Philip. Principles of Marketing Ed.8Philip Kotler, Gary Armstrong. Prentice-Hall, 1999.

Dyfyniad MLA

KOTLER, Philip. Principles of Marketing Ed.8Philip Kotler, Gary Armstrong. Prentice-Hall, 1999.

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