Possible worlds of science fiction

MLA

Conklin, Groff and Mark B. Adams Science Fiction Collection (University of Pennsylvania). Possible worlds of science fiction. Berkley edition. New York : Berkley, 1955.

APA

Conklin, G. & Mark B. Adams Science Fiction Collection (University of Pennsylvania). (1955). Possible worlds of science fiction. Berkley edition. New York : Berkley.

Chicago

Conklin, Groff and Mark B. Adams Science Fiction Collection (University of Pennsylvania). Possible worlds of science fiction. Edited by Groff Conklin. Berkley edition. New York : Berkley, 1955.