Cita APA (7th ed.)

Borroff, E., & Clark, J. B. (1992). American operas: A checklist. Harmonie Park Press.

Cita Chicago (17th ed.)

Borroff, Edith, i J. Bunker Clark. American Operas: A Checklist. Warren, Mich: Harmonie Park Press, 1992.

Cita MLA (9th ed.)

Borroff, Edith, i J. Bunker Clark. American Operas: A Checklist. Harmonie Park Press, 1992.