APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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