Callahan, J. F., Clark, L. H., & Kellough, R. D. (2002). Teaching in the middle and secondary schools (7th ed.). Merrill.
Chicago-čujuhus (17. p.)Callahan, Joseph F., Leonard H. Clark, juo Richard D. Kellough. Teaching in the Middle and Secondary Schools. 7th ed. Upper Saddle River, N.J.: Merrill, 2002.
MLA-čujuhus (9. p.)Callahan, Joseph F., et al. Teaching in the Middle and Secondary Schools. 7th ed. Merrill, 2002.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.