APA
Eckert J. W., . (2006). Linux + guide to Linux certification 2nd ed. [Place of publication not identified]: Thomson Course Technology.
Chicago
Eckert Jason W, . 2006. Linux + guide to Linux certification 2nd ed. [Place of publication not identified]: Thomson Course Technology.
Harvard
Eckert J. W., . (2006). Linux + guide to Linux certification 2nd ed. [Place of publication not identified]: Thomson Course Technology.
MLA
Eckert Jason W, . Linux + guide to Linux certification 2nd ed. [Place of publication not identified]: Thomson Course Technology. 2006.