Cita APA (7th ed.)

Obrien,James A. (2007). Enter prise information Systems (13.). McGraw-Hill Publ.

Cita Chicago (17th ed.)

Obrien,James A. Enter Prise Information Systems. 13. Boston: McGraw-Hill Publ, 2007.

Cita MLA (9th ed.)

Obrien,James A. Enter Prise Information Systems. 13. McGraw-Hill Publ, 2007.