Leavitt, D. (1987). The lost language of cranes. Penguin.
Chicago-Zitierstil (17. Ausg.)Leavitt, David. The Lost Language of Cranes. Harmondsworth: Penguin, 1987.
MLA-Zitierstil (8. Ausg.)Leavitt, David. The Lost Language of Cranes. Penguin, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.