Não informado. (1974). AID research and development abstracts. Agency for International Development.
Chicago-Zitierstil (17. Ausg.)Não informado. AID Research and Development Abstracts. Washington: Agency for International Development, 1974.
MLA-Zitierstil (8. Ausg.)Não informado. AID Research and Development Abstracts. Agency for International Development, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.