APA (7th ed.) Citation

Walker, R. T. (1954). The origin and history of the earth. Walker Corp..

Chicago Style (17th ed.) Citation

Walker, Robert Tunstall. The Origin and History of the Earth. Colorado Springs: Walker Corp., 1954.

MLA (8th ed.) Citation

Walker, Robert Tunstall. The Origin and History of the Earth. Walker Corp., 1954.

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