Douglas, J. L. (1980). A research study of natural organic resins and applied painting treatment reports.
Lua i Stíl Chicago (17ú heag.)Douglas, Jane L. A Research Study of Natural Organic Resins and Applied Painting Treatment Reports. Florence, Italy, 1980.
Lua MLA (8ú heag.)Douglas, Jane L. A Research Study of Natural Organic Resins and Applied Painting Treatment Reports. 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.