Engel, L. (1972). Words with music: The Broadway musical libretto. Schirmer.
Chicago-Zitierstil (17. Ausg.)Engel, Lehman. Words with Music: The Broadway Musical Libretto. New York: Schirmer, 1972.
MLA-Zitierstil (8. Ausg.)Engel, Lehman. Words with Music: The Broadway Musical Libretto. Schirmer, 1972.
警告：這些引文格式不一定是100％准確.