APA Citation

 Gee, J. P. (2014).  An Introduction to discourse analysis.  Routledge.

Chicago Style Citation

 Gee, James Paul.  An Introduction to Discourse Analysis.  Routledge, 2014.

MLA Citation

 Gee, James Paul.  An Introduction to Discourse Analysis.  Routledge, 2014.

Warning: These citations may not always be 100% accurate.