Tham khảo Sinh_vật_đáng_sợ

    • Boatright, Mody C. (1934). Tall Tales from Texas Cow Camps. Dallas, Texas: The Southwest Press.
    • Botkin, B.A. biên tập (1955). A Treasury of American Folklore. New York, NY: Crown Publishers.
    • The American People: Stories, Legends, Tales, Traditions, and Songs. New Jersey: Transaction Publishers. 1977.
    • Davidson, Levette Jay; Blake, Forrester biên tập (1947). Rocky Mountain Tales. Tulsa, Oklahoma: University of Oklahoma Press.
    • Leach, Maria biên tập (1972). Funk & Wagnall's Standard Dictionary of Folklore, Mythology and Legend. New York, NY: Harper & Row.
    • MacDougall, Curtis D. (1958). Hoaxes. New York, NY: Dover Publications, Inc.
    • Cohen, Daniel (1975). Monsters, Giants, and Little Men from Mars: An Unnatural History of the Americas. New York, NY: Doubleday.