Não informado. (1964). IBP news. International Council of Scientific Unions, Special Committee for the International Biological Programme.
Citação do estilo Chicago (17ª ed.)Não informado. IBP News. London: International Council of Scientific Unions, Special Committee for the International Biological Programme, 1964.
Citação MLA (8ª ed.)Não informado. IBP News. International Council of Scientific Unions, Special Committee for the International Biological Programme, 1964.
警告：這些引文格式不一定是100％准確.