APA (7th ed.) Zitazioa

(1914). Catalogue of opera librettos printed before 1800.

Chicago Style (17th ed.) Zitazioa

Catalogue of Opera Librettos Printed Before 1800. 1914.

MLA (9th ed.) Zitazioa

Catalogue of Opera Librettos Printed Before 1800. 1914.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.