MEDLEY, D. B., & MEDLEY, D. B. (1984). Programming Principles With Cobol I Don B. Medley And Ronald W. Eaves. South-Western Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMEDLEY, Don B., और Don B. MEDLEY. Programming Principles With Cobol I Don B. Medley And Ronald W. Eaves. South-Western Publishing, 1984.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMEDLEY, Don B., और Don B. MEDLEY. Programming Principles With Cobol I Don B. Medley And Ronald W. Eaves. South-Western Publishing, 1984.
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