[digital vocal score] West Side Story.

MLA

Bernstein, Leonard, and Stephen Sondheim. [digital Vocal Score] West Side Story. New York, London: Schirmer/Chappell, .d.

APA

Bernstein, L., & Sondheim, S. (.d). [digital vocal score] West Side Story. New York, London: Schirmer/Chappell.

Chicago

Bernstein, Leonard, and Stephen Sondheim. [digital Vocal Score] West Side Story. New York, London: Schirmer/Chappell, .d.