Beckmann, J. P. 1. (2010). Safe passages: Highways, wildlife, and habitat connectivity. Washington, DC: Island Press.
Čikaški stil citiranjaBeckmann, Jon P. 1963-. Safe Passages: Highways, Wildlife, and Habitat Connectivity. Washington, DC: Island Press, 2010.
MLA način citiranjaBeckmann, Jon P. 1963-. Safe Passages: Highways, Wildlife, and Habitat Connectivity. Washington, DC: Island Press, 2010.
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