Originalno: The Giant Book of Classical Piano Sheet Music. Ibert. Impromptu in A-flat Major, Op. 142, No. 2. Ibert. Advanced. Book.
Prevod: Giant Book of Classical Piano Sheet Music. Impromptu v A-duru, op. 142, št 2. Impromptu v A-duru, op. 142, št 2. Napredno.