Cita APA (7th ed.)

Callahan, J. F., Clark, L. H., & Kellough, R. D. (2002). Teaching in the middle and secondary schools (7th ed.). Merrill.

Cita Chicago (17th ed.)

Callahan, Joseph F., Leonard H. Clark, i Richard D. Kellough. Teaching in the Middle and Secondary Schools. 7th ed. Upper Saddle River, N.J.: Merrill, 2002.

Cita MLA (9th ed.)

Callahan, Joseph F., et al. Teaching in the Middle and Secondary Schools. 7th ed. Merrill, 2002.