Dyfyniad APA

Armstrong, G., & Kotler, P. (1998). Marketing: An introduction (6th ed.). Canada: Prentice Hall.

Dyfyniad Arddull Chicago

Armstrong, Gary, và Philip Kotler. Marketing: An Introduction. 6th ed. Canada: Prentice Hall, 1998.

Dyfyniad MLA

Armstrong, Gary, và Philip Kotler. Marketing: An Introduction. 6th ed. Canada: Prentice Hall, 1998.

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