Cita APA

 Eckert, J. W. (2016).  CompTIA Linux+ guide to Linux certification.  Cengage.

Chicago Style Citation

 Eckert, Jason W.  CompTIA Linux+ Guide to Linux Certification.  Cengage, 2016.

Cita MLA

 Eckert, Jason W.  CompTIA Linux+ Guide to Linux Certification.  Cengage, 2016.