McFarlan, D. e. (1989). The guinness book of records 1990. Guinness Pub. Ltd.
Lua i Stíl Chicago (17ú heag.)McFarlan, Donald ed. The Guinness Book of Records 1990. Enfield: Guinness Pub. Ltd, 1989.
Lua MLA (9ú heag.)McFarlan, Donald ed. The Guinness Book of Records 1990. Guinness Pub. Ltd, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.