APA (7th ed.) Citation

Time-Life Books & Horn, H. (1974). The pioneers. Time-Life Books.

Chicago Style (17th ed.) Citation

Time-Life Books and Huston Horn. The Pioneers. New York: Time-Life Books, 1974.

MLA (9th ed.) Citation

Time-Life Books and Huston Horn. The Pioneers. Time-Life Books, 1974.