Cita APA (7th ed.)

Burbidge, P., & Sutton, R. (1979). The Wagner companion. Faber and Faber.

Cita Chicago (17th ed.)

Burbidge, Peter, i Richard Sutton. The Wagner Companion. Londres: Faber and Faber, 1979.

Cita MLA (9th ed.)

Burbidge, Peter, i Richard Sutton. The Wagner Companion. Faber and Faber, 1979.