Παραπομπή APA

Verdi, G., Cammarano, S., & Jefferys, C. (1980). Il trovatore: An opera in four acts : complete opera for voice and pianoforte. Milano: Ricordi.

Παραπομπή Chicago Style

Verdi, Giuseppe, Salvatore Cammarano, και Charles Jefferys. Il Trovatore: An Opera in Four Acts : Complete Opera for Voice and Pianoforte. Milano: Ricordi, 1980.

Παραπομπή MLA

Verdi, Giuseppe, Salvatore Cammarano, και Charles Jefferys. Il Trovatore: An Opera in Four Acts : Complete Opera for Voice and Pianoforte. Milano: Ricordi, 1980.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.