Tohutoro APA (7th ed.)

Muir, J. (1981). Our national parks. University of Wisconsin Press.

Tohutoru Kātū Chicago (17th ed.)

Muir, John. Our National Parks. Madison, Wis.: University of Wisconsin Press, 1981.

Tohutoro MLA (9th ed.)

Muir, John. Our National Parks. University of Wisconsin Press, 1981.