Cita APA (7th ed.)

Sor, F., & Segovia, A. (1945). Twenty studies for the guitar. Edward B. Marks Music.

Cita Chicago (17th ed.)

Sor, Fernando, i Andres Segovia. Twenty Studies for the Guitar. New York: Edward B. Marks Music, 1945.

Cita MLA (9th ed.)

Sor, Fernando, i Andres Segovia. Twenty Studies for the Guitar. Edward B. Marks Music, 1945.