एपीए उद्धरण

Bookman, H. (1993). COBOL/370 for VS COBOL and COBOL II programmers. McGraw-Hill.

शिकागो स्टाइल उद्धरण

Bookman, Harvey. COBOL/370 for VS COBOL and COBOL II Programmers. New York: McGraw-Hill, 1993.

एमएलए उद्धरण

Bookman, Harvey. COBOL/370 for VS COBOL and COBOL II Programmers. McGraw-Hill, 1993.