Martin, B. (1987). World Birds. Guinness Superlatives Ltd.
Lua i Stíl Chicago (17ú heag.)Martin, Brian. World Birds. London: Guinness Superlatives Ltd, 1987.
Lua MLA (9ú heag.)Martin, Brian. World Birds. Guinness Superlatives Ltd, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.