Citazione APA

Clute, J. E., & Nicholls, P. E. (1993). The Encyclopedia of Science fiction.

Stile di citazione Chicago

Clute, John; Ed, e Peter; Ed Nicholls. The Encyclopedia of Science Fiction. New York, Martin`s Press, 1993.

Citazione MLA

Clute, John; Ed, e Peter; Ed Nicholls. The Encyclopedia of Science Fiction. 1993.