Cita APA (7th ed.)

Shelly, G. B., & Cashman, T. J. (1977). Introduction to computer programming structured COBOL. Anaheim Pub.

Cita Chicago (17th ed.)

Shelly, Gary B., i Thomas J. Cashman. Introduction to Computer Programming Structured COBOL. Fullerton, Calif: Anaheim Pub, 1977.

Cita MLA (9th ed.)

Shelly, Gary B., i Thomas J. Cashman. Introduction to Computer Programming Structured COBOL. Anaheim Pub, 1977.