Tarbuck, E. J., & Lutgens, F. K. (1997). Earth science (8th.ed.). Prentice Hall.

Tarbuck, Edward J., and Frederick K. Lutgens. Earth Science. 8th.ed. New Jersey: Prentice Hall, 1997.

Tarbuck, Edward J., and Frederick K. Lutgens. Earth Science. 8th.ed. Prentice Hall, 1997.