APA

Samuel N., . (2007). The 10 mightiest mountains. New York: Scholastic.

Chicago

Samuel Nigel, . 2007. The 10 mightiest mountains. New York: Scholastic.

Harvard

Samuel N., . (2007). The 10 mightiest mountains. New York: Scholastic.

MLA

Samuel Nigel, . The 10 mightiest mountains. New York: Scholastic. 2007.