Edmund C. Sutton. (2012). Observational Astronomy (1.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Edmund C. Sutton. Observational Astronomy. 1. Cambridge University Press, 2012.
Lua MLA (8ú heag.)Edmund C. Sutton. Observational Astronomy. 1. Cambridge University Press, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.