Não informado. (1976). Quick bibliography series. National Agricultural Library, Department of Agriculture.
Čikaški stil citiranja (17. izdanje)Não informado. Quick Bibliography Series. Beltsville, Md: National Agricultural Library, Department of Agriculture, 1976.
MLA način citiranja (8. izdanje)Não informado. Quick Bibliography Series. National Agricultural Library, Department of Agriculture, 1976.
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