APA (7th ed.) Citation

Ashworth, C., Knapp, W., Tans'ur, W., Flagg, J., & Revere, P. Sixteen anthems.

Chicago Style (17th ed.) Citation

Ashworth, Caleb, William Knapp, William Tans'ur, Josiah Flagg, and Paul Revere. Sixteen Anthems.

MLA (9th ed.) Citation

Ashworth, Caleb, et al. Sixteen Anthems.