Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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