Craighead, J. D., Sumner, J. S., & Mitchell, J. A. (1995). The Grizzly Bears of Yellowstone: Their ecology in the Yellowstone ecosystem, 1959 - 1992. Island Press.
Chicago-Zitierstil (17. Ausg.)Craighead, John D., Jay S. Sumner, und John A. Mitchell. The Grizzly Bears of Yellowstone: Their Ecology in the Yellowstone Ecosystem, 1959 - 1992. Washington, Wash: Island Press, 1995.
MLA-Zitierstil (9. Ausg.)Craighead, John D., et al. The Grizzly Bears of Yellowstone: Their Ecology in the Yellowstone Ecosystem, 1959 - 1992. Island Press, 1995.
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