Lua APA (7ú heag.)

Heertje, A. (1977). Economics and technical change. Wiley.

Lua i Stíl Chicago (17ú heag.)

Heertje, Arnold. Economics and Technical Change. New York: Wiley, 1977.

Lua MLA (9ú heag.)

Heertje, Arnold. Economics and Technical Change. Wiley, 1977.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.