APA Citatie

Aaker, D. A., & Day, G. S. (1990). Marketing research/4e (4th ed.). John wiley and sons.

Chicago Style citaat

Aaker, David A., en George S. Day. Marketing Research/4e. 4th ed. New York: John wiley and sons, 1990.

MLA citatie

Aaker, David A., en George S. Day. Marketing Research/4e. 4th ed. John wiley and sons, 1990.