APA

clark b. h., . (1951). nine modern american plays. New York: appleton century.

Chicago

clark barrett h, . 1951. nine modern american plays. New York: appleton century.

Harvard

clark b. h., . (1951). nine modern american plays. New York: appleton century.

MLA

clark barrett h, . nine modern american plays. New York: appleton century. 1951.