Dickinson Terence. Summer stargazing, apractical for recreational astronomers. Firefly Book.
Chicago-referens (17:e uppl.)Dickinson Terence. Summer Stargazing, Apractical for Recreational Astronomers. Firefly Book.
MLA-referens (9:e uppl.)Dickinson Terence. Summer Stargazing, Apractical for Recreational Astronomers. Firefly Book.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.