(1998). Encyclopedia of birds: The comprehensive illustrated guide by international experts. San Diego, CA: Academic Press.
Chicago-tyylinen lähdeviittausEncyclopedia of Birds: The Comprehensive Illustrated Guide By International Experts. San Diego, CA: Academic Press, 1998.
MLA-viiteEncyclopedia of Birds: The Comprehensive Illustrated Guide By International Experts. San Diego, CA: Academic Press, 1998.
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