Kuttner, H. (1953). Ahead of time: Ten stories of science fiction and fantasy. Ballantine books.
Čikaški stil citiranja (17. izdanje)Kuttner, Henry. Ahead of Time: Ten Stories of Science Fiction and Fantasy. New York: Ballantine books, 1953.
MLA način citiranja (8. izdanje)Kuttner, Henry. Ahead of Time: Ten Stories of Science Fiction and Fantasy. Ballantine books, 1953.
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