APA استشهاد

Philippakis, A. S. (1974). Information systems through COBOL/2nd ed (2nd ed.). McGraw-Hill.

استشهاد بنمط شيكاغو

Philippakis, Andreas S. Information Systems Through COBOL/2nd Ed. 2nd ed. Auckland: McGraw-Hill, 1974.

MLA استشهاد

Philippakis, Andreas S. Information Systems Through COBOL/2nd Ed. 2nd ed. McGraw-Hill, 1974.