Cita APA (7th ed.)

Halpern, R. P. (1985). Microcomputer graphics using Pascal for the IBM PC and compatibles. Harper & Row.

Cita Chicago (17th ed.)

Halpern, Richard P. Microcomputer Graphics Using Pascal for the IBM PC and Compatibles. New York: Harper & Row, 1985.

Cita MLA (8th ed.)

Halpern, Richard P. Microcomputer Graphics Using Pascal for the IBM PC and Compatibles. Harper & Row, 1985.