Verhoef, G. The power of your life. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Verhoef, G. The Power of Your Life. Oxford University Press.
Lua MLA (8ú heag.)Verhoef, G. The Power of Your Life. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.