Gaya APA

Hester, E, L. (1996). Successful marketing research : the complete guide to getting and using essential information about your customers and competitors / Edward L. Hester . New York: John Wiley n Sons.

Gaya MLA

Hester, Edward, L.. "Successful marketing research : the complete guide to getting and using essential information about your customers and competitors / Edward L. Hester". New York: John Wiley n Sons, 1996. Textbook.