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.) CitationAsente, 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.) CitationAsente, Paul J., et al. X Window System Toolkit: The Complete Programmer's Guide and Specification : X Version, Release 4. Digital Press, 1990.
Warning: These citations may not always be 100% accurate.