APA (7e ed.) Bronvermelding

Não informado. (1956). Smithsonian contributions to astrophysics. Smithsonian Institution.

Chicago (17e ed.) Bronvermelding

Não informado. Smithsonian Contributions to Astrophysics. Washington: Smithsonian Institution, 1956.

MLA (8e ed.) Bronvermelding

Não informado. Smithsonian Contributions to Astrophysics. Smithsonian Institution, 1956.

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