APA (7th ed.) Citation

Verdi, G., & Heger, R. (1970). Rigoletto: Oper in drei Akten / Giuseppe Verdi. Heliodor.

Chicago Style (17th ed.) Citation

Verdi, Giuseppe, and Robert Heger. Rigoletto: Oper in Drei Akten / Giuseppe Verdi. [S.l.]: Heliodor, 1970.

MLA (8th ed.) Citation

Verdi, Giuseppe, and Robert Heger. Rigoletto: Oper in Drei Akten / Giuseppe Verdi. Heliodor, 1970.