Παραπομπή APA

Key,, L. (2007). RHCE red hat certified engineer linux. Dreamtech.

Παραπομπή Chicago Style

Key,, Learn. RHCE Red Hat Certified Engineer Linux. New Delhi: Dreamtech, 2007.

Παραπομπή MLA

Key,, Learn. RHCE Red Hat Certified Engineer Linux. Dreamtech, 2007.