Cita APA (7th ed.)

Modell, M. E. (1988). A professional's guide to systems analysis. McGraw-Hill.

Cita Chicago (17th ed.)

Modell, Martin E. A Professional's Guide to Systems Analysis. New York: McGraw-Hill, 1988.

Cita MLA (9th ed.)

Modell, Martin E. A Professional's Guide to Systems Analysis. McGraw-Hill, 1988.