Buchanan,Noel. (1993). Discovering the wonders of our world. Readers Digest Association.
Lua i Stíl Chicago (17ú heag.)Buchanan,Noel. Discovering the Wonders of Our World. London: Readers Digest Association, 1993.
Lua MLA (9ú heag.)Buchanan,Noel. Discovering the Wonders of Our World. Readers Digest Association, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.