APA stil citiranja

(1970). Living history in the national park system: Living history in the national park system. Washington: U.S.

Chicago stil citiranja

Living history in the national park system: Living history in the national park system. Washington: U.S, 1970.

MLA stil citiranja

Living history in the national park system: Living history in the national park system. Washington: U.S, 1970.

Napomena: Ova citiranost nije uvijek 100% točna.