Citazione Stile APA (7a Edizione)

Welburn, T. (1987). Structured Cobol 74/85: Fundamentals and style (687 p.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Welburn, Tyler. Structured Cobol 74/85: Fundamentals and Style. 687 p. New York: McGraw-Hill, 1987.

Citatione MLA (9a ed.)

Welburn, Tyler. Structured Cobol 74/85: Fundamentals and Style. 687 p. McGraw-Hill, 1987.