APA (7 वां संस्करण) प्रशस्ति पत्र

Grauer, R. T. (1981). A COBOL book of practice and reference. Prentice-Hall.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Grauer, Robert T. A COBOL Book of Practice and Reference. Englewood Cliffs, N.J.: Prentice-Hall, 1981.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Grauer, Robert T. A COBOL Book of Practice and Reference. Prentice-Hall, 1981.