APA (7th ed.) Citation

Whipple, G., & James, P. E. (1947). Our earth. MacMillan.

Chicago Style (17th ed.) Citation

Whipple, Gertrude, and Preston E. James. Our Earth. New York: MacMillan, 1947.

MLA (9th ed.) Citation

Whipple, Gertrude, and Preston E. James. Our Earth. MacMillan, 1947.

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