Sobel, B. (1950). The theatre handbook and digest of plays (7th printing--Rev. ed.). Crown Publishers.
Chicago-viite (17. p.)Sobel, Bernard. The Theatre Handbook and Digest of Plays. 7th printing--Rev. ed. New York: Crown Publishers, 1950.
MLA-viite (8. p.)Sobel, Bernard. The Theatre Handbook and Digest of Plays. 7th printing--Rev. ed. Crown Publishers, 1950.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.