Παραπομπή APA

Bender, P. S. (1976). Design and operation of customer service systems. AMACOM.

Παραπομπή Chicago Style

Bender, Paul S. Design and Operation of Customer Service Systems. New York: AMACOM, 1976.

Παραπομπή MLA

Bender, Paul S. Design and Operation of Customer Service Systems. AMACOM, 1976.