Shapiro, A. M. (2007). Field guide to butterflies of the San Francisco Bay and Sacramento Valley regions. University of California Press.
Citace podle Chicago (17th ed.)Shapiro, Arthur M. Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions. Berkeley: University of California Press, 2007.
Citace podle MLA (9th ed.)Shapiro, Arthur M. Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions. University of California Press, 2007.
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