Cita APA (7a ed.)

Gassner, J. (1949). Twenty best plays of the modern American theatre. Crown.

Cita Chicago Style (17a ed.)

Gassner, John. Twenty Best Plays of the Modern American Theatre. New York: Crown, 1949.

Cita MLA (9a ed.)

Gassner, John. Twenty Best Plays of the Modern American Theatre. Crown, 1949.