Singer, H. W. (1982). Technologies for basic needs (Second edition.). International Labour Office.
Chicago (17e ed.) BronvermeldingSinger, H. W. Technologies for Basic Needs. Second edition. Geneva: International Labour Office, 1982.
MLA (8e ed.) BronvermeldingSinger, H. W. Technologies for Basic Needs. Second edition. International Labour Office, 1982.
Let op: Deze citaties zijn niet altijd 100% accuraat.