APA (7e ed.) Bronvermelding

Callahan, J. F., & Clark, L. H. (1988). Teaching in the middle and secondary schools: Planning for competence (3rd ed.). Macmillan.

Chicago (17e ed.) Bronvermelding

Callahan, Joseph F., en Leonard H. Clark. Teaching in the Middle and Secondary Schools: Planning for Competence. 3rd ed. New York: Macmillan, 1988.

MLA (9e ed.) Bronvermelding

Callahan, Joseph F., en Leonard H. Clark. Teaching in the Middle and Secondary Schools: Planning for Competence. 3rd ed. Macmillan, 1988.