Não informado. (1938). The American Biology Teacher. National Association of Biology Teachers.
Style de citation Chicago (17e éd.)Não informado. The American Biology Teacher. Reston, Va: National Association of Biology Teachers, 1938.
Style de citation MLA (8e éd.)Não informado. The American Biology Teacher. National Association of Biology Teachers, 1938.
Attention : ces citations peuvent ne pas être correctes à 100%.