Cox, T. R. (1988). The park builders: A history of state parks in the Pacific northwest. University of Washington Press.
Citace podle Chicago (17th ed.)Cox, Thomas R. The Park Builders: A History of State Parks in the Pacific Northwest. Seattle: University of Washington Press, 1988.
Citace podle MLA (9th ed.)Cox, Thomas R. The Park Builders: A History of State Parks in the Pacific Northwest. University of Washington Press, 1988.
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