Cita APA (7a ed.)

Retske, G. (1995). The International callback book: An insider's view. Flatiron.

Cita Chicago Style (17a ed.)

Retske, Gene. The International Callback Book: An Insider's View. New York: Flatiron, 1995.

Cita MLA (9a ed.)

Retske, Gene. The International Callback Book: An Insider's View. Flatiron, 1995.