APA (7th ed.) Citation

Gass, I. G., Smith, P. J., & Wilson, R. C. L. (1971). Understanding the earth: A reader in the earth sciences. M.I.T. Press.

Chicago Style (17th ed.) Citation

Gass, I. G., Peter J. Smith, and R. C. L. Wilson. Understanding the Earth: A Reader in the Earth Sciences. Cambridge, Mass: M.I.T. Press, 1971.

MLA (9th ed.) Citation

Gass, I. G., et al. Understanding the Earth: A Reader in the Earth Sciences. M.I.T. Press, 1971.