MLA

Normann, Jules. Little Dorrit's Polka : Performed before Her Majesty / Composed by Jules Normann. Musical Bouquet Office : 0AD. https://collections.library.yale.edu/catalog/16593087.

APA, 6th edition

Normann, J. (0 C.E.). Little Dorrit's polka : performed before her Majesty / composed by Jules Normann. [Scores, Sheet music covers]. Musical Bouquet Office : https://collections.library.yale.edu/catalog/16593087.