SIMPSON, G. G. (1965). Principles Of Animal Taxonomy. Oxford Book Company.
Lua i Stíl Chicago (17ú heag.)SIMPSON, George Gaylord. Principles Of Animal Taxonomy. Oxford Book Company, 1965.
Lua MLA (8ú heag.)SIMPSON, George Gaylord. Principles Of Animal Taxonomy. Oxford Book Company, 1965.
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