Não informado. (1981). Health technology directions. Program for Appropriate Technology.
Chicagoスタイル(17版)引用形式Não informado. Health Technology Directions. Seattle, Wash: Program for Appropriate Technology, 1981.
MLA(8版)引用形式Não informado. Health Technology Directions. Program for Appropriate Technology, 1981.
警告: この引用は必ずしも正確ではありません.