Wonder, S., & Murtha, P. (2017). Don't You Worry 'bout a Thing: Words and music by Stevie Wonder. Arr. by Paul Murtha. Hal Leonard.
Lua i Stíl Chicago (17ú heag.)Wonder, Stevie, agus Paul Murtha. Don't You Worry 'Bout a Thing: Words and Music by Stevie Wonder. Arr. by Paul Murtha. Milwaukee, Wis.: Hal Leonard, 2017.
Lua MLA (8ú heag.)Wonder, Stevie, agus Paul Murtha. Don't You Worry 'Bout a Thing: Words and Music by Stevie Wonder. Arr. by Paul Murtha. Hal Leonard, 2017.
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