Cita APA (7th ed.)

Graham, N. (1984). Programming the IBM personal computer: COBOL. Holt, Rinehart, and Winston.

Cita Chicago (17th ed.)

Graham, Neill. Programming the IBM Personal Computer: COBOL. New York: Holt, Rinehart, and Winston, 1984.

Cita MLA (9th ed.)

Graham, Neill. Programming the IBM Personal Computer: COBOL. Holt, Rinehart, and Winston, 1984.