Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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