Gebhard, J. G. (2006). Teaching English as a foreign or second language: A teacher self-development and methodology guide (2nd ed.). University of Michigan Press.

Gebhard, Jerry Greer. Teaching English as a Foreign or Second Language: A Teacher Self-development and Methodology Guide. 2nd ed. Ann Arbor: University of Michigan Press, 2006.

Gebhard, Jerry Greer. Teaching English as a Foreign or Second Language: A Teacher Self-development and Methodology Guide. 2nd ed. University of Michigan Press, 2006.