Cita APA (7a ed.)

Ardoin, J. (1987). Callas at Juilliard: The master classes. Robson Books.

Cita Chicago Style (17a ed.)

Ardoin, John. Callas at Juilliard: The Master Classes. London: Robson Books, 1987.

Cita MLA (9a ed.)

Ardoin, John. Callas at Juilliard: The Master Classes. Robson Books, 1987.