Não informado. (1981). Health technology directions. Program for Appropriate Technology.
Chicago (17e ed.) BronvermeldingNão informado. Health Technology Directions. Seattle, Wash: Program for Appropriate Technology, 1981.
MLA (8e ed.) BronvermeldingNão informado. Health Technology Directions. Program for Appropriate Technology, 1981.
Let op: Deze citaties zijn niet altijd 100% accuraat.