Cita APA (7a ed.)
Villiers, A. (1963). Our mother nature: The conservation of nature and natural resources in the Sudan-Sahel zone of Africa. IUCN.
Cita Chicago Style (17a ed.)
Villiers, A. Our Mother Nature: The Conservation of Nature and Natural Resources in the Sudan-Sahel Zone of Africa. Morges: IUCN, 1963.
Cita MLA (9a ed.)
Villiers, A. Our Mother Nature: The Conservation of Nature and Natural Resources in the Sudan-Sahel Zone of Africa. IUCN, 1963.
Precaución: Estas citas no son 100% exactas.