APA (7th ed.) Citation

Quercia, V., & O'Reilly, T. (1990). X Window System user's guide: For X11 R3 and R4 of the X Window System (Third edition, revised to reflect release 4.). O'Reilly & Associates.

Chicago Style (17th ed.) Citation

Quercia, Valerie, and Tim O'Reilly. X Window System User's Guide: For X11 R3 and R4 of the X Window System. Third edition, revised to reflect release 4. Sebastopol, CA: O'Reilly & Associates, 1990.

MLA (9th ed.) Citation

Quercia, Valerie, and Tim O'Reilly. X Window System User's Guide: For X11 R3 and R4 of the X Window System. Third edition, revised to reflect release 4. O'Reilly & Associates, 1990.