Kump, L. R., Crane, R. G., & Kasting, J. F. (1999). The earth system. Prentice-Hall, Inc.
Lua i Stíl Chicago (17ú heag.)Kump, Lee R., Robert G. Crane, agus James F. Kasting. The Earth System. Upper Saddle River, New Jersey: Prentice-Hall, Inc, 1999.
Lua MLA (9ú heag.)Kump, Lee R., et al. The Earth System. Prentice-Hall, Inc, 1999.
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