Silver, G. A. (1981). Graphic layout and design (Rev. ed.). Delmar Pub.
Chicago Style aipamenaSilver, Gerald A. Graphic Layout and Design. Rev. ed. New York: Delmar Pub, 1981.
MLA aipamenaSilver, Gerald A. Graphic Layout and Design. Rev. ed. Delmar Pub, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.