Wentz, W. B., & Eyrich, G. I. (1970). Marketing: Theory and application. New York: Harcourt, Brace & World.
Trích dẫn kiểu ChicagoWentz, Walter B., và Gerald I. Eyrich. Marketing: Theory and Application. New York: Harcourt, Brace & World, 1970.
Deismireacht MLAWentz, Walter B., và Gerald I. Eyrich. Marketing: Theory and Application. New York: Harcourt, Brace & World, 1970.
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