Clute, J. E., & Nicholls, P. E. (1993). The Encyclopedia of Science fiction.
Chicago Style aipamenaClute, John; Ed, and Peter; Ed Nicholls. The Encyclopedia of Science Fiction. New York, Martin`s Press, 1993.
MLA aipamenaClute, John; Ed, and Peter; Ed Nicholls. The Encyclopedia of Science Fiction. 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.