APA (7th ed.) Citation

Ray, D. S., & Ray, E. J. (2003). UNIX (2nd ed.). Peachpit Press.

Chicago Style (17th ed.) Citation

Ray, Deborah S., and Eric J. Ray. UNIX. 2nd ed. Berkeley, CA: Peachpit Press, 2003.

MLA (9th ed.) Citation

Ray, Deborah S., and Eric J. Ray. UNIX. 2nd ed. Peachpit Press, 2003.