Young. Environment, Economy, and Christian Ethics. Augsburg Fortress Publishers.
Lua i Stíl Chicago (17ú heag.)Young. Environment, Economy, and Christian Ethics. Augsburg Fortress Publishers.
Lua MLA (9ú heag.)Young. Environment, Economy, and Christian Ethics. Augsburg Fortress Publishers.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.