Cita APA (7a ed.)

Quercia, V. A., & O'Reilly, T. C. (1990). X Window System User's Guide (Third edition, revised to reflect release 4.). O'Reilly Media Incorporated.

Cita Chicago Style (17a ed.)

Quercia, Valerie Author, y Tim Contributor O'Reilly. X Window System User's Guide. Third edition, revised to reflect release 4. [Place of publication not identified]: O'Reilly Media Incorporated, 1990.

Cita MLA (9a ed.)

Quercia, Valerie Author, y Tim Contributor O'Reilly. X Window System User's Guide. Third edition, revised to reflect release 4. O'Reilly Media Incorporated, 1990.