Alkuperäinen: Jerry Snyder's Guitar School, Ensemble Book, Book 1. Jerry Snyder. Easy Guitar sheet music. Beginning. 24 Graded Duets, Trios, and Quartets.
Käännös: Jerry Snyder Guitar School, Ensemble Book, Book 1. 24 Graded Duets, Trios, ja Kvartetteja. Kaanon. Kvartetti. Alku.