Não informado. (1970). National Parks and Conservation Magazine. National Parks & Conservation Association.
Cita Chicago Style (17a ed.)Não informado. National Parks and Conservation Magazine. Washington: National Parks & Conservation Association, 1970.
Cita MLA (8a ed.)Não informado. National Parks and Conservation Magazine. National Parks & Conservation Association, 1970.
Precaución: Estas citas no son 100% exactas.