Heertje, A. (1977). Economics and technical change. London: Weidenfeld & Nicolson.
シカゴスタイル引用形Heertje, Arnold. Economics and Technical Change. London: Weidenfeld & Nicolson, 1977.
MLA引用形式Heertje, Arnold. Economics and Technical Change. London: Weidenfeld & Nicolson, 1977.
警告: この引用は必ずしも正確ではありません.