APA (7th ed.) Citation

Druckman, J., De Gaetani, J., Carlyss, G., & Ayers, R. Dark upon the harp.

Chicago Style (17th ed.) Citation

Druckman, Jacob, Jan De Gaetani, Gerald Carlyss, and Roy Ayers. Dark upon the Harp.

MLA (9th ed.) Citation

Druckman, Jacob, et al. Dark upon the Harp.