Não informado. (2018). Report of the U.S. National Committee for the International Biological Program. National Academy of Sciences.
Citação do estilo Chicago (17ª ed.)Não informado. Report of the U.S. National Committee for the International Biological Program. Washington: National Academy of Sciences, 2018.
Citação MLA (8ª ed.)Não informado. Report of the U.S. National Committee for the International Biological Program. National Academy of Sciences, 2018.
警告：这些引文格式不一定是100％准确.