APA (7th ed.) Citation

Schubert, F. P., Schumann, R. A., Franz, R., & Rubinstein, A. One hundred songs by ten masters.

Chicago Style (17th ed.) Citation

Schubert, Franz Peter, Robert Alexander Schumann, Robert Franz, and Anton Rubinstein. One Hundred Songs by Ten Masters.

MLA (9th ed.) Citation

Schubert, Franz Peter, et al. One Hundred Songs by Ten Masters.