Dyfyniad APA

Heertje, A. (1977). Economics and technical change. London: Weidenfeld & Nicolson.

Dyfyniad Arddull Chicago

Heertje, Arnold. Economics and Technical Change. London: Weidenfeld & Nicolson, 1977.

Dyfyniad MLA

Heertje, Arnold. Economics and Technical Change. London: Weidenfeld & Nicolson, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.