McCalla, R. (1985). Structured Cobol programming and data -: Processing methods. Brooks/Cole.
Citazione stile Chigago Style (17a edizione)McCalla, Richard. Structured Cobol Programming and Data -: Processing Methods. Monterey, Calif.: Brooks/Cole, 1985.
Citatione MLA (9a ed.)McCalla, Richard. Structured Cobol Programming and Data -: Processing Methods. Brooks/Cole, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.