APA Style

GAGNE, A, S, P, B, G, A, G. (2013). OPERATING SYSTEM CONCEPTS (9th Edition). USA: JOHN WILEY & SONS, LTD.

MLA Style

GAGNE, ABRAHAM, SILBERSCHATZ,, PETER, BAER, GALVIN, AND, GREG. "OPERATING SYSTEM CONCEPTS". 9th Edition USA: JOHN WILEY & SONS, LTD, 2013. Management.