Cita APA (7th ed.)

Tepper, R. (1990). The only 250 letters and memos managers will ever need. J. Wiley.

Cita Chicago (17th ed.)

Tepper, Ron. The Only 250 Letters and Memos Managers Will Ever Need. New York: J. Wiley, 1990.

Cita MLA (9th ed.)

Tepper, Ron. The Only 250 Letters and Memos Managers Will Ever Need. J. Wiley, 1990.