Citazione APA

Callahan, J. F., & Clark, L. H. C. (1990). Teaching in the middle and secondary schools (3.).

Stile di citazione Chicago

Callahan, Joseph F., e Leonard H Clark Clark. Teaching in the Middle and Secondary Schools. 3. New York, MacMillan Publishing Company, 1990.

Citazione MLA

Callahan, Joseph F., e Leonard H Clark Clark. Teaching in the Middle and Secondary Schools. 3. 1990.