Cita APA (7a ed.)

Wagner, R., & Ellis, W. A. (1995). Opera and drama. University of Nebraska Press.

Cita Chicago Style (17a ed.)

Wagner, Richard, y William Ashton Ellis. Opera and Drama. Lincoln: University of Nebraska Press, 1995.

Cita MLA (9a ed.)

Wagner, Richard, y William Ashton Ellis. Opera and Drama. University of Nebraska Press, 1995.