Cita APA (7th ed.)

Thomas, R. (1985). A user guide to the UNIX system (2nd ed.). National Book Store.

Cita Chicago (17th ed.)

Thomas, Rebecca. A User Guide to the UNIX System. 2nd ed. Manila: National Book Store, 1985.

Cita MLA (9th ed.)

Thomas, Rebecca. A User Guide to the UNIX System. 2nd ed. National Book Store, 1985.