APA

Shreve A., . (2009). A Change in Altitude. New York: Little, Brown and Company.

Chicago

Shreve Anita, . 2009. A Change in Altitude. New York: Little, Brown and Company.

Harvard

Shreve A., . (2009). A Change in Altitude. New York: Little, Brown and Company.

MLA

Shreve Anita, . A Change in Altitude. New York: Little, Brown and Company. 2009.