APA Style

Kotler, Philip; Gary Amstrong. (1990). Principles Of Marketing 5th edition . : .

Chicago Style

Kotler, Philip; Gary Amstrong. Principles Of Marketing 5th edition. : , 1990. .

MLA Style

Kotler, Philip; Gary Amstrong. Principles Of Marketing 5th edition. : , 1990. .

Turabian Style

Kotler, Philip; Gary Amstrong. Principles Of Marketing 5th edition. : , 1990. .