APA ציטוט

Clarke, A. C. (1958). Profiles of the future an enquiry into the limits of the possible. Harper.

Chicago Edition Citation

Clarke, Arthur C. Profiles of the Future an Enquiry into the Limits of the Possible. New York: Harper, 1958.

ציטוט MLA

Clarke, Arthur C. Profiles of the Future an Enquiry into the Limits of the Possible. Harper, 1958.