Sheet music, librettos : Ephemera
MLA
Sheet Music, Librettos. Marlborough, Wiltshire: Adam Matthew Digital, 2015
APA, 7th edition
(2015). Sheet music, librettos. Marlborough, Wiltshire: Adam Matthew Digital
Chicago, 17th edition
Sheet music, librettos. Marlborough, Wiltshire: Adam Matthew Digital, 2015