APA-referens (7:e uppl.)

Mengak, K. (2012). Reshaping our national parks and their guardians: The legacy of George B. Hartzog Jr. University of New Mexico Press.

Chicago-referens (17:e uppl.)

Mengak, Kathy. Reshaping Our National Parks and Their Guardians: The Legacy of George B. Hartzog Jr. Albuquerque: University of New Mexico Press, 2012.

MLA-referens (9:e uppl.)

Mengak, Kathy. Reshaping Our National Parks and Their Guardians: The Legacy of George B. Hartzog Jr. University of New Mexico Press, 2012.