APA

Kump L. R., Kasting J. F. & Crane R. G. (1999). The earth system. Upper Saddle River, N.J: Prentice Hall.

Chicago

Kump Lee R, Kasting James F and Crane Robert G. 1999. The earth system. Upper Saddle River, N.J: Prentice Hall.

Harvard

Kump L. R., Kasting J. F. and Crane R. G. (1999). The earth system. Upper Saddle River, N.J: Prentice Hall.

MLA

Kump Lee R, Kasting James F and Crane Robert G. The earth system. Upper Saddle River, N.J: Prentice Hall. 1999.