Cita APA (7a ed.)

Romberg, B. (1948). Duet no.1 in D major - opus 9, for two cellos. Ed. by F. Gruetzmacher. International Music.

Cita Chicago Style (17a ed.)

Romberg, Bernhard. Duet No.1 in D Major - Opus 9, for Two Cellos. Ed. by F. Gruetzmacher. New York: International Music, 1948.

Cita MLA (9a ed.)

Romberg, Bernhard. Duet No.1 in D Major - Opus 9, for Two Cellos. Ed. by F. Gruetzmacher. International Music, 1948.