एपीए उद्धरण

Haag, S., & Cummings, M. (2006). Information systems essentials. Boston: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Haag, Stephen., और Maeve Cummings. Information Systems Essentials. Boston: McGraw-Hill, 2006.

एमएलए उद्धरण

Haag, Stephen., और Maeve Cummings. Information Systems Essentials. Boston: McGraw-Hill, 2006.