APA (7th ed.) Citation

Walker, J. C. G. (1986). Earth history: The several ages of the earth. Jones and Bartlett Publishers.

Chicago Style (17th ed.) Citation

Walker, James C. G. Earth History: The Several Ages of the Earth. Boston: Jones and Bartlett Publishers, 1986.

MLA (9th ed.) Citation

Walker, James C. G. Earth History: The Several Ages of the Earth. Jones and Bartlett Publishers, 1986.