Não informado. (1877). Observatory: A monthly review of astronomy. Royal Greenwich Observatory.
Lua i Stíl Chicago (17ú heag.)Não informado. Observatory: A Monthly Review of Astronomy. Sussex, Inglaterra: Royal Greenwich Observatory, 1877.
Lua MLA (8ú heag.)Não informado. Observatory: A Monthly Review of Astronomy. Royal Greenwich Observatory, 1877.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.