Lua APA (7ú heag.)

De Bono, E. (1977). The happiness purpose. Temple Smith.

Lua i Stíl Chicago (17ú heag.)

De Bono, Edward. The Happiness Purpose. London: Temple Smith, 1977.

Lua MLA (8ú heag.)

De Bono, Edward. The Happiness Purpose. Temple Smith, 1977.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.