Não informado. (1974). AID research and development abstracts. Agency for International Development.
Citação do estilo Chicago (17ª ed.)Não informado. AID Research and Development Abstracts. Washington: Agency for International Development, 1974.
Citação MLA (8ª ed.)Não informado. AID Research and Development Abstracts. Agency for International Development, 1974.
警告：這些引文格式不一定是100％准確.