Schuller, R. H. (1973). The greatest possibility thinker that ever lived. Fleming H.Revell.
Lua i Stíl Chicago (17ú heag.)Schuller, Robert H. The Greatest Possibility Thinker That Ever Lived. New Jersey: Fleming H.Revell, 1973.
Lua MLA (9ú heag.)Schuller, Robert H. The Greatest Possibility Thinker That Ever Lived. Fleming H.Revell, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.