Cita APA (7th ed.)

Singer, L. M. (1986). Written communications for MIS/DP professionals. Macmillan.

Cita Chicago (17th ed.)

Singer, Larry M. Written Communications for MIS/DP Professionals. New York: Macmillan, 1986.

Cita MLA (9th ed.)

Singer, Larry M. Written Communications for MIS/DP Professionals. Macmillan, 1986.