APA (7e ed.) Bronvermelding

Não informado. (1969). Astronomy and Astrophysics Abstracts. Astronomisches Recheninstitut.

Chicago (17e ed.) Bronvermelding

Não informado. Astronomy and Astrophysics Abstracts. Berlin: Astronomisches Recheninstitut, 1969.

MLA (8e ed.) Bronvermelding

Não informado. Astronomy and Astrophysics Abstracts. Astronomisches Recheninstitut, 1969.

Let op: Deze citaties zijn niet altijd 100% accuraat.