Barker, R. C. (1988). The power of decision. Dood Mead.
Lua i Stíl Chicago (17ú heag.)Barker, Raymond Charles. The Power of Decision. Dood Mead, 1988.
Lua MLA (9ú heag.)Barker, Raymond Charles. The Power of Decision. Dood Mead, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.