APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.