Hill, D. (1946). Co-operative research in industry. Hutchinsons Scientific and Technical Publications.
Lua i Stíl Chicago (17ú heag.)Hill, D.W. Co-operative Research in Industry. London: Hutchinsons Scientific and Technical Publications, 1946.
Lua MLA (9ú heag.)Hill, D.W. Co-operative Research in Industry. Hutchinsons Scientific and Technical Publications, 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.