APA

Koh، Frederick, . (2008). The 10 most fascinating cities. New York: scholastic.

Chicago

Koh، Frederick, . 2008. The 10 most fascinating cities. New York: scholastic.

Harvard

Koh، Frederick, . (2008). The 10 most fascinating cities. New York: scholastic.

MLA

Koh، Frederick, . The 10 most fascinating cities. New York: scholastic. 2008.