APA引文

Hopkins, D. S., & Bailey, E. L. (1970). Customer service: A progress report. The Conference Board.

Chicago Style (17th ed.) Citation

Hopkins, David S., and Earl L. Bailey. Customer Service: A Progress Report. [New York]: The Conference Board, 1970.

MLA引文

Hopkins, David S., and Earl L. Bailey. Customer Service: A Progress Report. The Conference Board, 1970.