APA

Burt J., . (2007). The 10 most valuable elements. New York: Scholastic.

Chicago

Burt Judith, . 2007. The 10 most valuable elements. New York: Scholastic.

Harvard

Burt J., . (2007). The 10 most valuable elements. New York: Scholastic.

MLA

Burt Judith, . The 10 most valuable elements. New York: Scholastic. 2007.