APA (7th ed.) Citation

Drury, S. A. (1999). Stepping stones: The making of our home world. Oxford University Press.

Chicago Style (17th ed.) Citation

Drury, S. A. Stepping Stones: The Making of Our Home World. New York: Oxford University Press, 1999.

MLA (9th ed.) Citation

Drury, S. A. Stepping Stones: The Making of Our Home World. Oxford University Press, 1999.