Lemon, R. D. (1955). Durango industrial survey. Bureau of Business Research, University of Colorado.
Lua i Stíl Chicago (17ú heag.)Lemon, Ronald D. Durango Industrial Survey. Boulder: Bureau of Business Research, University of Colorado, 1955.
Lua MLA (8ú heag.)Lemon, Ronald D. Durango Industrial Survey. Bureau of Business Research, University of Colorado, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.