APA

C. Richards J., Bohlke D. & O'Dell K. (2012). Four corners. New York: Cambridge University Press.

Chicago

C. Richards Jack, Bohlke David and O'Dell Kathryn. 2012. Four corners. New York: Cambridge University Press.

Harvard

C. Richards J., Bohlke D. and O'Dell K. (2012). Four corners. New York: Cambridge University Press.

MLA

C. Richards Jack, Bohlke David and O'Dell Kathryn. Four corners. New York: Cambridge University Press. 2012.