Não informado. (1938). The American Biology Teacher. National Association of Biology Teachers.
Chicagoスタイル(17版)引用形式Não informado. The American Biology Teacher. Reston, Va: National Association of Biology Teachers, 1938.
MLA(8版)引用形式Não informado. The American Biology Teacher. National Association of Biology Teachers, 1938.
警告: この引用は必ずしも正確ではありません.