Não informado. (2002). Circular of the United States Naval Observatory. U.S. Naval Observatory.
Chicagoスタイル(17版)引用形式Não informado. Circular of the United States Naval Observatory. Washington: U.S. Naval Observatory, 2002.
MLA(8版)引用形式Não informado. Circular of the United States Naval Observatory. U.S. Naval Observatory, 2002.
警告: この引用は必ずしも正確ではありません.