Ehrenberg, R. G., & Hurst, P. J. (1996). The 1995 NRC ratings of doctoral programs: A hedonic model. National Bureau of Economic Research.
Lua i Stíl Chicago (17ú heag.)Ehrenberg, Ronald G., agus Peter J. Hurst. The 1995 NRC Ratings of Doctoral Programs: A Hedonic Model. Cambridge: National Bureau of Economic Research, 1996.
Lua MLA (9ú heag.)Ehrenberg, Ronald G., agus Peter J. Hurst. The 1995 NRC Ratings of Doctoral Programs: A Hedonic Model. National Bureau of Economic Research, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.