Cook, R., & Guidall, G. (2006). Marker. Berkley Books.
Cita Chicago (17th ed.)Cook, Robin, i George Guidall. Marker. New York: Berkley Books, 2006.
Cita MLA (9th ed.)Cook, Robin, i George Guidall. Marker. Berkley Books, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.