Não informado. (1980). Proceedings of the National Academy of Sciences of the United States of America. National Academy of Sciences.
Citação do estilo Chicago (17ª ed.)Não informado. Proceedings of the National Academy of Sciences of the United States of America. Washington: National Academy of Sciences, 1980.
Citação MLA (8ª ed.)Não informado. Proceedings of the National Academy of Sciences of the United States of America. National Academy of Sciences, 1980.
警告：這些引文格式不一定是100％准確.