APA

Chapey G., . (1989). Developing speaking skill. New York: Gregg Division, McGraw-Hill.

Chicago

Chapey Geraldine, . 1989. Developing speaking skill. New York: Gregg Division, McGraw-Hill.

Harvard

Chapey G., . (1989). Developing speaking skill. New York: Gregg Division, McGraw-Hill.

MLA

Chapey Geraldine, . Developing speaking skill. New York: Gregg Division, McGraw-Hill. 1989.