Gaya APA

PERRY, B., HUSS, C. (2011). VCP VMware Certified Professional on vSphere 4 (1). Indianapolis: Wiley Publishing, inc.

Gaya MLA

PERRY, Brian., HUSS, Chris. "VCP VMware Certified Professional on vSphere 4". 1 Indianapolis: Wiley Publishing, inc, 2011. Printed.