APA (7th ed.) Citation

(1990). UNIX system V release 4: Programmer's reference manual. Jemma, Inc.

Chicago Style (17th ed.) Citation

UNIX System V Release 4: Programmer's Reference Manual. Cainta, Rizal: Jemma, Inc, 1990.

MLA (9th ed.) Citation

UNIX System V Release 4: Programmer's Reference Manual. Jemma, Inc, 1990.

Warning: These citations may not always be 100% accurate.