Cita APA (7a ed.)

Mager, N. H., & Mager, S. K. (1968). The complete letter writer (Revised ed.). Pocket Books.

Cita Chicago Style (17a ed.)

Mager, Nathan H., y Sylvia K. Mager. The Complete Letter Writer. Revised ed. New York: Pocket Books, 1968.

Cita MLA (9a ed.)

Mager, Nathan H., y Sylvia K. Mager. The Complete Letter Writer. Revised ed. Pocket Books, 1968.