Cita APA (7th ed.)

Smith, R. W. (2009). CompTIA Linux+ study guide. Wiley Pub..

Cita Chicago (17th ed.)

Smith, Roderick W. CompTIA Linux+ Study Guide. Indianapolis, Ind.: Wiley Pub., 2009.

Cita MLA (9th ed.)

Smith, Roderick W. CompTIA Linux+ Study Guide. Wiley Pub., 2009.