Não informado. (1969). Smithsonian contributions to paleobiology. Smithsonian Institution.
Chicagoスタイル(17版)引用形式Não informado. Smithsonian Contributions to Paleobiology. Washington: Smithsonian Institution, 1969.
MLA(8版)引用形式Não informado. Smithsonian Contributions to Paleobiology. Smithsonian Institution, 1969.
警告: この引用は必ずしも正確ではありません.