Cita APA (7a ed.)

USING.. (1990). Using unix system V release 3. McGraw-Hill.

Cita Chicago Style (17a ed.)

USING.. Using Unix System V Release 3. New York: McGraw-Hill, 1990.

Cita MLA (9a ed.)

USING.. Using Unix System V Release 3. McGraw-Hill, 1990.

Precaución: Estas citas no son 100% exactas.