Cita APA (7a ed.)

Yarmish, R., & Wohl, G. (1993). Structured Cobol: A direct approach. Prentice-Hall.

Cita Chicago Style (17a ed.)

Yarmish, Rina, y Gerald Wohl. Structured Cobol: A Direct Approach. Englewood Cliffs, New Jersey: Prentice-Hall, 1993.

Cita MLA (9a ed.)

Yarmish, Rina, y Gerald Wohl. Structured Cobol: A Direct Approach. Prentice-Hall, 1993.