APA

Poole R. M. e. l., . (1989). Nature's wonderlands. Washington: National Geographic Society.

Chicago

Poole Robert M ed lit, . 1989. Nature's wonderlands. Washington: National Geographic Society.

Harvard

Poole R. M. e. l., . (1989). Nature's wonderlands. Washington: National Geographic Society.

MLA

Poole Robert M ed lit, . Nature's wonderlands. Washington: National Geographic Society. 1989.