APA

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

Chicago

C. Richards Jack, Bohlke David and Sherman Kristin. 2012. Four corners. New York: Cambridge University Press.

Harvard

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

MLA

C. Richards Jack, Bohlke David and Sherman Kristin. Four corners. New York: Cambridge University Press. 2012.