APA

Heck S. F., Cobes J. P., . (1978). All the classroom is a stage: the creative classroom environment. New York: Pergamon Press.

Chicago

Heck Shirley F, Cobes Jon P, . 1978. All the classroom is a stage: the creative classroom environment. New York: Pergamon Press.

Harvard

Heck S. F., Cobes J. P., . (1978). All the classroom is a stage: the creative classroom environment. New York: Pergamon Press.

MLA

Heck Shirley F, Cobes Jon P, . All the classroom is a stage: the creative classroom environment. New York: Pergamon Press. 1978.