Não informado. (1956). Smithsonian contributions to astrophysics. Smithsonian Institution.
Chicagoスタイル(17版)引用形式Não informado. Smithsonian Contributions to Astrophysics. Washington: Smithsonian Institution, 1956.
MLA(8版)引用形式Não informado. Smithsonian Contributions to Astrophysics. Smithsonian Institution, 1956.
警告: この引用は必ずしも正確ではありません.