Cita APA

(1992). National parks of the west. Menlo Park, Calif: Sunset Pub. Co.

Chicago Style Citation

National Parks of the West. Menlo Park, Calif: Sunset Pub. Co, 1992.

Cita MLA

National Parks of the West. Menlo Park, Calif: Sunset Pub. Co, 1992.

Atenció: Aquestes cites poden no estar 100% correctes.