Não informado. (1940). Agricultural Science and Genetics Newsletter. U.S. Department of Agriculture.
Style de citation Chicago (17e éd.)Não informado. Agricultural Science and Genetics Newsletter. Cold Spring Harbor, NY: U.S. Department of Agriculture, 1940.
Style de citation MLA (8e éd.)Não informado. Agricultural Science and Genetics Newsletter. U.S. Department of Agriculture, 1940.
Attention : ces citations peuvent ne pas être correctes à 100%.