Não informado. (1877). Observatory: A monthly review of astronomy. Royal Greenwich Observatory.
Style de citation Chicago (17e éd.)Não informado. Observatory: A Monthly Review of Astronomy. Sussex, Inglaterra: Royal Greenwich Observatory, 1877.
Style de citation MLA (8e éd.)Não informado. Observatory: A Monthly Review of Astronomy. Royal Greenwich Observatory, 1877.
Attention : ces citations peuvent ne pas être correctes à 100%.