Heffner, H. C. S. S. D. W. (1973). Modern theatre practice (5th ed.). Appleton-Century-Crofts.
Dyfyniad Arddull ChicagoHeffner, Hubert C. Selden,Samuel Sellman,Hunton D Walkup,Fairfax. Modern Theatre Practice. 5th ed. New York: Appleton-Century-Crofts, 1973.
Dyfyniad MLAHeffner, Hubert C. Selden,Samuel Sellman,Hunton D Walkup,Fairfax. Modern Theatre Practice. 5th ed. Appleton-Century-Crofts, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.