- & HEFFNER, H. C. d. (1973). Modern theatre practice.--Ed. 5. Appleton-Century-Crofts.
Dyfyniad Arddull Chicago- and Huber C. dkk HEFFNER. Modern Theatre Practice.--Ed. 5. New York: Appleton-Century-Crofts, 1973.
Dyfyniad MLA- and Huber C. dkk HEFFNER. Modern Theatre Practice.--Ed. 5. Appleton-Century-Crofts, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.