[digital vocal score] Billy Budd : opera in two acts

MLA

Britten, Benjamin, et al. [digital Vocal Score] Billy Budd : Opera In Two Acts. revised ed. London: Boosey & Hawkes, 1961.

APA

Britten, B., Crozier, E., Forster, E. Morgan, & Melville, H. (1961). [digital vocal score] Billy Budd : opera in two acts. revised ed. London: Boosey & Hawkes.

Chicago

Britten, Benjamin, Eric Crozier, Edward Morgan Forster, and Herman Melville. [digital Vocal Score] Billy Budd: Opera In Two Acts. revised ed. London: Boosey & Hawkes, 1961.