APA (7th ed.) Citation

Prime Computer, Inc. (1979). The DBMS COBOL reference guide, PDR 3046 (Preliminary document release [i.e. 2nd ed].). Prime Computer Inc.

Chicago Style (17th ed.) Citation

Prime Computer, Inc. The DBMS COBOL Reference Guide, PDR 3046. Preliminary document release [i.e. 2nd ed]. Framingham Ma: Prime Computer Inc, 1979.

MLA (8th ed.) Citation

Prime Computer, Inc. The DBMS COBOL Reference Guide, PDR 3046. Preliminary document release [i.e. 2nd ed]. Prime Computer Inc, 1979.