APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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