APA (7th ed.) Citation

Gregoir, J., Léonard, H., & Donizetti, G. (1872). Don Pasquale: 4.me duo. B. Schott's Söhne.

Chicago Style (17th ed.) Citation

Gregoir, Jacques, Hubert Léonard, and Gaetano Donizetti. Don Pasquale: 4.me Duo. Mayence: B. Schott's Söhne, 1872.

MLA (9th ed.) Citation

Gregoir, Jacques, et al. Don Pasquale: 4.me Duo. B. Schott's Söhne, 1872.