APA (7th ed.) Citation

Day, N. R., & Cyrus, K. (2015). What in the world?: Numbers in nature. Beach Lane Books.

Chicago Style (17th ed.) Citation

Day, Nancy Raines, and Kurt Cyrus. What in the World?: Numbers in Nature. New York: Beach Lane Books, 2015.

MLA (8th ed.) Citation

Day, Nancy Raines, and Kurt Cyrus. What in the World?: Numbers in Nature. Beach Lane Books, 2015.

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