Debono, E. (1978). lateral Thinking. Penguine books.
Lua i Stíl Chicago (17ú heag.)Debono, Edward. Lateral Thinking. Bew York: Penguine books, 1978.
Lua MLA (9ú heag.)Debono, Edward. Lateral Thinking. Penguine books, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.