APA (7th ed.) Citation

Claybourne,Anna. (1999). The usborne encyclopedia of planet earth. Usborne.

Chicago Style (17th ed.) Citation

Claybourne,Anna. The Usborne Encyclopedia of Planet Earth. London: Usborne, 1999.

MLA (9th ed.) Citation

Claybourne,Anna. The Usborne Encyclopedia of Planet Earth. Usborne, 1999.

Warning: These citations may not always be 100% accurate.