APA (7th ed.) Citation

(1991). NeXT operating system software (1. print.). Addison-Wesley.

Chicago Style (17th ed.) Citation

NeXT Operating System Software. 1. print. Reading, Mass. u.a: Addison-Wesley, 1991.

MLA (9th ed.) Citation

NeXT Operating System Software. 1. print. Addison-Wesley, 1991.

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