APA (7th ed.) Citation

Karkoff, M., Söderberg, P., & °Aberg, S. Four duets for lutes.

Chicago Style (17th ed.) Citation

Karkoff, Maurice, Peter Söderberg, and Sven °Aberg. Four Duets for Lutes.

MLA (9th ed.) Citation

Karkoff, Maurice, et al. Four Duets for Lutes.