Dyfyniad APA

Verdi, G. (1957). Un ballo in maschera (A masked ball): Opera in three acts. G. Schirmer.

Dyfyniad Arddull Chicago

Verdi, Giuseppe. Un Ballo in Maschera (A Masked Ball): Opera in Three Acts. New York: G. Schirmer, 1957.

Dyfyniad MLA

Verdi, Giuseppe. Un Ballo in Maschera (A Masked Ball): Opera in Three Acts. G. Schirmer, 1957.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.