Cita APA (7a ed.)

VACCAI, N., MARZIALS, T., & BAKER, T. (1894). Practical italian vocal Method. G. Schirmer.

Cita Chicago Style (17a ed.)

VACCAI, Niccoló, Theo MARZIALS, y Th BAKER. Practical Italian Vocal Method. New York: G. Schirmer, 1894.

Cita MLA (9a ed.)

VACCAI, Niccoló, et al. Practical Italian Vocal Method. G. Schirmer, 1894.