APA
Sobell M. G., . (2005). A practical guide to Red Hat Linux. Upper Saddle River, N.J: Prentice Hall Professional Technical Reference.
Chicago
Sobell Mark G, . 2005. A practical guide to Red Hat Linux. Upper Saddle River, N.J: Prentice Hall Professional Technical Reference.
Harvard
Sobell M. G., . (2005). A practical guide to Red Hat Linux. Upper Saddle River, N.J: Prentice Hall Professional Technical Reference.
MLA
Sobell Mark G, . A practical guide to Red Hat Linux. Upper Saddle River, N.J: Prentice Hall Professional Technical Reference. 2005.