Cita APA (7th ed.)

Kay, J., & Kummerfeld, B. (1989). C programming in a UNIX environment. National Book Store.

Cita Chicago (17th ed.)

Kay, Judy, i Bob Kummerfeld. C Programming in a UNIX Environment. Manila: National Book Store, 1989.

Cita MLA (9th ed.)

Kay, Judy, i Bob Kummerfeld. C Programming in a UNIX Environment. National Book Store, 1989.