Proctor, T. (2005). Essentials of marketing research (4th ed.). Financial Times/Prentice Hall.
Citazione stile Chigago Style (17a edizione)Proctor, Tony. Essentials of Marketing Research. 4th ed. Harlow, England ; New York: Financial Times/Prentice Hall, 2005.
Citatione MLA (8a ed.)Proctor, Tony. Essentials of Marketing Research. 4th ed. Financial Times/Prentice Hall, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.