APA (7th ed.) Citation

Patterson, H. (1976). The valhalla exchange. Fawcett crest book.

Chicago Style (17th ed.) Citation

Patterson, Harry. The Valhalla Exchange. New York: Fawcett crest book, 1976.

MLA (8th ed.) Citation

Patterson, Harry. The Valhalla Exchange. Fawcett crest book, 1976.

Warning: These citations may not always be 100% accurate.