Não informado. (1969). Astronomy and Astrophysics Abstracts. Astronomisches Recheninstitut.
Chicagoスタイル(17版)引用形式Não informado. Astronomy and Astrophysics Abstracts. Berlin: Astronomisches Recheninstitut, 1969.
MLA(8版)引用形式Não informado. Astronomy and Astrophysics Abstracts. Astronomisches Recheninstitut, 1969.
警告: この引用は必ずしも正確ではありません.