Spender, S. (1952). Learning Laughter. Weidenfeld & Nicolson.
Lua i Stíl Chicago (17ú heag.)Spender, Stephen. Learning Laughter. London: Weidenfeld & Nicolson, 1952.
Lua MLA (8ú heag.)Spender, Stephen. Learning Laughter. Weidenfeld & Nicolson, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.