If I Only Knew sheet music. Arrangement for Trombone, Baritone Saxophone, Alto Saxophone and Tenor Saxophone. By Daryl McKenzie
By Michelle Branch, for Electric guitar, Guitar and Piano, style Pop, Pop Rock and Rock
By Charles Miller, Kevin Hammonds and Elvis Presley, for Piano, style Musical or Show and Stage & Screen
For Piano, style Classical, Jazz and Country
By Ivor Novello, The Teddy Bears and Maggie Chapman, for Guitar, Piano and Electric guitar, style Stage & Screen, Pop Rock and Metal
By Robin Fredriksson, Frank Bello and Ben McKee, for Piano, Guitar and Electric guitar, style Pop Rock, Folk and Rock
By Kris Bowers, for Violin, style Classical