Science Fiction Writers of America. (1976). Writing & selling science fiction. Writer's Digest.
Chicago Style (17th ed.) CitationScience Fiction Writers of America. Writing & Selling Science Fiction. Cincinnati: Writer's Digest, 1976.
MLA (8th ed.) CitationScience Fiction Writers of America. Writing & Selling Science Fiction. Writer's Digest, 1976.
Warning: These citations may not always be 100% accurate.