Isn't It Enough to Think...Without Having to Believe sheet music.
By Anjanette Mickelsen, Mick Hucknall and Chris Tomlin, for Soprano, Viola and Tenor, style Broadway, Rock and Easy Listening
By Jason Robert Brown and Richard Walters, for Piano and Tenor, style Broadway, Stage & Screen and Musical
By Leslie Uggams and Jule Styne, for Piano, style Stage & Screen and Musical
By Sam Cooke, H B Barnum and Robert Massey, for Piano and Guitar, style Folk, Soul and Pop-Soul
By Paul Anka and Glee Cast, for Guitar, Piano and Electronic keyboard, style Pop, Pop Rock and Crooners
By Billie Joe Armstrong, Mike Dirnt and Tre Cool, for Piano and Guitar, style punk, Pop Rock and Pop