Cita APA (7th ed.)
Schmid, W. (1977). Hal leonard guitar method. Hal Leonard.
Cita Chicago (17th ed.)
Schmid, Will. Hal Leonard Guitar Method. Milwaukee: Hal Leonard, 1977.
Cita MLA (9th ed.)
Schmid, Will. Hal Leonard Guitar Method. Hal Leonard, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.