Burkhardt Frederick. (1996). Charles Darwin's letters: A selection 1825-1859. CUP.
シカゴスタイル引用形Burkhardt Frederick. Charles Darwin's Letters: A Selection 1825-1859. Cambridge: CUP, 1996.
MLA引用形式Burkhardt Frederick. Charles Darwin's Letters: A Selection 1825-1859. CUP, 1996.
警告: この引用は必ずしも正確ではありません.