Gaya APA

Asimov, I. (1963). The clock we live on, illustrated with diagrams by J.Bradford, new.rev.ed. - Collier books, AS 512. Copyright 1959. . New York: Collier Books.

Gaya MLA

Asimov, I.. "The clock we live on, illustrated with diagrams by J.Bradford, new.rev.ed. - Collier books, AS 512. Copyright 1959. ". New York: Collier Books, 1963. Buku.