Cita APA (7a ed.)

Roy, M. (1982). Cobol programming (2nd.). Tata Mc Graw Hill.

Cita Chicago Style (17a ed.)

Roy, M. Cobol Programming. 2nd. New Delhi: Tata Mc Graw Hill, 1982.

Cita MLA (9a ed.)

Roy, M. Cobol Programming. 2nd. Tata Mc Graw Hill, 1982.