APA

Kelly W. J., Lawton D. L., . (2004). Discovery. New York: Pearson Education.

Chicago

Kelly William J, Lawton Deborah L, . 2004. Discovery. New York: Pearson Education.

Harvard

Kelly W. J., Lawton D. L., . (2004). Discovery. New York: Pearson Education.

MLA

Kelly William J, Lawton Deborah L, . Discovery. New York: Pearson Education. 2004.