APA (7th ed.) Citation

Karels, M. J., Leffler, S. J., McKusick, M. K., & Quarterman, J. S. (1989). The design and implementation of the 4.3BSD UNIX operating system. Addison-Wesley.

Chicago Style (17th ed.) Citation

Karels, Michael J., Samuel J. Leffler, Marshall K. McKusick, and John S. Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating System. Reading Massachusetts: Addison-Wesley, 1989.

MLA (8th ed.) Citation

Karels, Michael J., et al. The Design and Implementation of the 4.3BSD UNIX Operating System. Addison-Wesley, 1989.