Cita APA (7th ed.)

Grauer, R. (1985). Structured cobol programming. Prentice Hall.

Cita Chicago (17th ed.)

Grauer, Robert. Structured Cobol Programming. Englewood Cliffs: Prentice Hall, 1985.

Cita MLA (9th ed.)

Grauer, Robert. Structured Cobol Programming. Prentice Hall, 1985.