Cita APA (7th ed.)

Rosenthal, H. D. (1956). Sopranos of today: Studies of twenty-five opera singers. J. Calder.

Cita Chicago (17th ed.)

Rosenthal, Harold D. Sopranos of Today: Studies of Twenty-five Opera Singers. London: J. Calder, 1956.

Cita MLA (9th ed.)

Rosenthal, Harold D. Sopranos of Today: Studies of Twenty-five Opera Singers. J. Calder, 1956.