APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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