Cita APA (7a ed.)

Sardou, V., & Illica, L. (2015). Tosca an opera in three acts.

Cita Chicago Style (17a ed.)

Sardou, V., y L. Illica. Tosca an Opera in Three Acts. 2015.

Cita MLA (9a ed.)

Sardou, V., y L. Illica. Tosca an Opera in Three Acts. 2015.