Cita APA (7a ed.)

Haag, S., & Cummings, M. (2006). Information Systems Essentials. McGraw Hill.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

Haag, Stephen, y Maeve Cummings. Information Systems Essentials. McGraw Hill, 2006.