@book{8333,
	author = {Brockett, Oscar G. and Ball, Robert J.},
	title = {The essential theatre},
	publisher = {Thomson,},
	year = {2004.},
	address = {Australia :},
	edition = {8th ed.},
	url = {https://books.google.com.pk/books?id=UE6CQgAACAAJ&dq=9780534577858&hl=en&sa=X&redir_esc=y}
}