Citazione Stile APA (7a Edizione)

Spence, J. W. (1985). COBOL for the 80s (Second edition.). West Publishing Company.

Citazione stile Chigago Style (17a edizione)

Spence, J. Wayne. COBOL for the 80s. Second edition. St. Paul, MN: West Publishing Company, 1985.

Citatione MLA (9a ed.)

Spence, J. Wayne. COBOL for the 80s. Second edition. West Publishing Company, 1985.