Cita APA (7a ed.)

Bear, F. E., Pritchard, H. W., & Akin, W. E. (1986). Earth: The stuff of life (2nd ed. / rev. by H. Wayne Pritchard and Wallace E. Akin.). University of Oklahoma Press.

Cita Chicago Style (17a ed.)

Bear, Firman E., H. Wayne Pritchard, y Wallace E. Akin. Earth: The Stuff of Life. 2nd ed. / rev. by H. Wayne Pritchard and Wallace E. Akin. Norman: University of Oklahoma Press, 1986.

Cita MLA (9a ed.)

Bear, Firman E., et al. Earth: The Stuff of Life. 2nd ed. / rev. by H. Wayne Pritchard and Wallace E. Akin. University of Oklahoma Press, 1986.