APA (7. basım) Alıntı

-. (1989). Nature's wonderlands: National park of the world. National geography society.

Chicago Style (17. basım) Atıf

-. Nature's Wonderlands: National Park of the World. Washington: National geography society, 1989.

MLA (9th ed.) Atıf

-. Nature's Wonderlands: National Park of the World. National geography society, 1989.