Παραπομπή σε μορφή APA (7η εκδ.)

Gettys, J., & Scheifler, R. W. (1990). X Window system: The complete reference to Xlib, X protocol, ICCCM, XLFD X version 11, release 4 (2nd ed.). Digital Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gettys, James, και Robert W. Scheifler. X Window System: The Complete Reference to Xlib, X Protocol, ICCCM, XLFD X Version 11, Release 4. 2nd ed. Digital Press, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Gettys, James, και Robert W. Scheifler. X Window System: The Complete Reference to Xlib, X Protocol, ICCCM, XLFD X Version 11, Release 4. 2nd ed. Digital Press, 1990.