APA Edition Citation

Kernighan, B. W., Kernighan, B. W., & Pike, R. (1999). The UNIX programming environment. Prentice Hall.

Chicago Edition Citation

Kernighan, Brian W., Brian W. Kernighan, and Rob Pike. The UNIX Programming Environment. New Delhi: Prentice Hall, 1999.

MLA Edition Citation

Kernighan, Brian W., et al. The UNIX Programming Environment. Prentice Hall, 1999.