Lean,Geoffrey. (1978). Rich world, poor world. George Allen & Unwin.
シカゴスタイル引用形Lean,Geoffrey. Rich World, Poor World. London: George Allen & Unwin, 1978.
MLA引用形式Lean,Geoffrey. Rich World, Poor World. George Allen & Unwin, 1978.
警告: この引用は必ずしも正確ではありません.