Cita APA (7th ed.)

Institute of Electrical and Electronics Engineers. (1993). Information technology-portable operating system interface (POSIX): Shell and utilities. IEEE.

Cita Chicago (17th ed.)

Institute of Electrical and Electronics Engineers. Information Technology-portable Operating System Interface (POSIX): Shell and Utilities. New York, N.Y: IEEE, 1993.

Cita MLA (9th ed.)

Institute of Electrical and Electronics Engineers. Information Technology-portable Operating System Interface (POSIX): Shell and Utilities. IEEE, 1993.