Cita APA (7a ed.)

Seltsam, W. H., & Robinson, F. (1968). Metropolitan opera annals: Second supplement : 1957-1966 : a chronicle of artists and performances. H.W. Wilson.

Cita Chicago Style (17a ed.)

Seltsam, William H., y Francis Robinson. Metropolitan Opera Annals: Second Supplement : 1957-1966 : A Chronicle of Artists and Performances. New York: H.W. Wilson, 1968.

Cita MLA (9a ed.)

Seltsam, William H., y Francis Robinson. Metropolitan Opera Annals: Second Supplement : 1957-1966 : A Chronicle of Artists and Performances. H.W. Wilson, 1968.