Cita APA (7th ed.)

Ashley, R., & Fernandez, J. N. (1984). Tape and disk files: Cobol book 3. Wiley.

Cita Chicago (17th ed.)

Ashley, Ruth, i Judi N. Fernandez. Tape and Disk Files: Cobol Book 3. New York: Wiley, 1984.

Cita MLA (8th ed.)

Ashley, Ruth, i Judi N. Fernandez. Tape and Disk Files: Cobol Book 3. Wiley, 1984.