Adamson, J. (1961). Living free: The history of Elsa and her cubs. Harcourt, Brace & World.
Citazione stile Chigago Style (17a edizione)Adamson, Joy. Living Free: The History of Elsa and Her Cubs. New York: Harcourt, Brace & World, 1961.
Citatione MLA (9a ed.)Adamson, Joy. Living Free: The History of Elsa and Her Cubs. Harcourt, Brace & World, 1961.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.