Schwarz, G. (2013). Schwarz, George, Collection. DigitalGeorgetown.
Chicago Style aipamenaSchwarz, George. Schwarz, George, Collection. Washington, D.C.: DigitalGeorgetown, 2013.
MLA aipamenaSchwarz, George. Schwarz, George, Collection. DigitalGeorgetown, 2013.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.