Não informado. (1981). Health technology directions. Program for Appropriate Technology.
Chicago-Zitierstil (17. Ausg.)Não informado. Health Technology Directions. Seattle, Wash: Program for Appropriate Technology, 1981.
MLA-Zitierstil (8. Ausg.)Não informado. Health Technology Directions. Program for Appropriate Technology, 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.