Lofgren, D. L. (1995). The bug creek problem and the and the cretaceous tertiary transition at McGuire creek, Montana. University of California Press.
Citace podle Chicago (17th ed.)Lofgren, Donald L. The Bug Creek Problem and the and the Cretaceous Tertiary Transition at McGuire Creek, Montana. Los Angeles: University of California Press, 1995.
Citace podle MLA (9th ed.)Lofgren, Donald L. The Bug Creek Problem and the and the Cretaceous Tertiary Transition at McGuire Creek, Montana. University of California Press, 1995.
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