Westerfeld, S. (2005). Uglies (First Simon Pulse edition.). Simon Pulse.
Chicago Style (17th ed.) ZitazioaWesterfeld, Scott. Uglies. First Simon Pulse edition. New York: Simon Pulse, 2005.
MLA (9th ed.) ZitazioaWesterfeld, Scott. Uglies. First Simon Pulse edition. Simon Pulse, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.