APA (7th ed.) Citation

Gregory, R. H. (1963). Business data processing & programming. Wadsworth Pub.

Chicago Style (17th ed.) Citation

Gregory, Robert H. Business Data Processing & Programming. Belmont, Calif: Wadsworth Pub, 1963.

MLA (9th ed.) Citation

Gregory, Robert H. Business Data Processing & Programming. Wadsworth Pub, 1963.