APA (7th ed.) Citation

Kumar, Aaker, & Day. (1999). Essentials of marketing research. John Wiley and Sons.

Chicago Style (17th ed.) Citation

Kumar, Aaker, and Day. Essentials of Marketing Research. New York: John Wiley and Sons, 1999.

MLA (9th ed.) Citation

Kumar, et al. Essentials of Marketing Research. John Wiley and Sons, 1999.

Warning: These citations may not always be 100% accurate.