APA (7th ed.) Citation

Asente, P. J., Swick, R. R., & MacCormack, J. (1990). X Window system toolkit: The complete programmer's guide and specification : X version, release 4. Digital Press.

Chicago Style (17th ed.) Citation

Asente, Paul J., Ralph R. Swick, and Joel MacCormack. X Window System Toolkit: The Complete Programmer's Guide and Specification : X Version, Release 4. Bedford, Massachusetts: Digital Press, 1990.

MLA (9th ed.) Citation

Asente, Paul J., et al. X Window System Toolkit: The Complete Programmer's Guide and Specification : X Version, Release 4. Digital Press, 1990.