APA (7th ed.) Citation

American Telephone and Telegraph Company. (1990). Unix System V/386, release 4: PC-interface administrator's guide. Prentice-Hall.

Chicago Style (17th ed.) Citation

American Telephone and Telegraph Company. Unix System V/386, Release 4: PC-interface Administrator's Guide. Englewood Cliffs, N.J.: Prentice-Hall, 1990.

MLA (9th ed.) Citation

American Telephone and Telegraph Company. Unix System V/386, Release 4: PC-interface Administrator's Guide. Prentice-Hall, 1990.