Darwin, C. (1939). Calendar of the Letters of Charles Robert Darwin to Asa Gray. The Historical Records Survey.
Chicagoスタイル(17版)引用形式Darwin, Charles. Calendar of the Letters of Charles Robert Darwin to Asa Gray. Boston, Mass.: The Historical Records Survey, 1939.
MLA(8版)引用形式Darwin, Charles. Calendar of the Letters of Charles Robert Darwin to Asa Gray. The Historical Records Survey, 1939.
警告: この引用は必ずしも正確ではありません.