Gaya APA

Callahan, J, F., Clark, L, H. (1982). Teaching in the middle and secondary schools : planning for competence (2nd ed). New York: Macmillan.

Gaya MLA

Callahan, Joseph, F.., Clark, Leonard, H.. "Teaching in the middle and secondary schools : planning for competence". 2nd ed New York: Macmillan, 1982. Text.