Singer, H. W. (1982). Technologies for basic needs (Second edition.). International Labour Office.
Lua i Stíl Chicago (17ú heag.)Singer, H. W. Technologies for Basic Needs. Second edition. Geneva: International Labour Office, 1982.
Lua MLA (8ú heag.)Singer, H. W. Technologies for Basic Needs. Second edition. International Labour Office, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.