APA

Somervill B. A., . (2002). Alaska. New York: Children's Press.

Chicago

Somervill Barbara A, . 2002. Alaska. New York: Children's Press.

Harvard

Somervill B. A., . (2002). Alaska. New York: Children's Press.

MLA

Somervill Barbara A, . Alaska. New York: Children's Press. 2002.