APA (7e ed.) Bronvermelding

Não informado. (2002). Circular of the United States Naval Observatory. U.S. Naval Observatory.

Chicago (17e ed.) Bronvermelding

Não informado. Circular of the United States Naval Observatory. Washington: U.S. Naval Observatory, 2002.

MLA (8e ed.) Bronvermelding

Não informado. Circular of the United States Naval Observatory. U.S. Naval Observatory, 2002.

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