Não informado. (1968). IBP boletim interamericano. U.S. National Academy of Sciences, International Biological Programe.
Style de citation Chicago (17e éd.)Não informado. IBP Boletim Interamericano. Washington: U.S. National Academy of Sciences, International Biological Programe, 1968.
Style de citation MLA (8e éd.)Não informado. IBP Boletim Interamericano. U.S. National Academy of Sciences, International Biological Programe, 1968.
Attention : ces citations peuvent ne pas être correctes à 100%.