Cita APA (7a ed.)

Ravel, M., Hettich, A., & Leduc, A. (1909). Repertoire moderne de vocalises-etudes. Alphonse Leduc.

Cita Chicago Style (17a ed.)

Ravel, Maurice, Amédée-Louis Hettich, y Alphonse Leduc. Repertoire Moderne De Vocalises-etudes. Paris: Alphonse Leduc, 1909.

Cita MLA (9a ed.)

Ravel, Maurice, et al. Repertoire Moderne De Vocalises-etudes. Alphonse Leduc, 1909.