Barbara Ward. (1972). Only one Earth: The care and maintenance of a small planet. New York: W. W. Norton.
シカゴスタイル引用形Barbara Ward. Only One Earth: The Care and Maintenance of a Small Planet. New York: W. W. Norton, 1972.
MLA引用形式Barbara Ward. Only One Earth: The Care and Maintenance of a Small Planet. New York: W. W. Norton, 1972.
警告: この引用は必ずしも正確ではありません.