APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.