APA-Zitierstil (7. Ausg.)

Keyes, N. B. (1957). The real book about our National Parks. Garden City Books.

Chicago-Zitierstil (17. Ausg.)

Keyes, Nelson Beecher. The Real Book About Our National Parks. New York: Garden City Books, 1957.

MLA-Zitierstil (9. Ausg.)

Keyes, Nelson Beecher. The Real Book About Our National Parks. Garden City Books, 1957.