APA (7th ed.) Zitazioa

Cowell, D. W. (1993). Services marketing (3rd ed.). Butterworth-Heinemann.

Chicago Style (17th ed.) Zitazioa

Cowell, Donald W. Services Marketing. 3rd ed. Oxford: Butterworth-Heinemann, 1993.

MLA (9th ed.) Zitazioa

Cowell, Donald W. Services Marketing. 3rd ed. Butterworth-Heinemann, 1993.