APA

Clancy T., . (1989). clear and present danger. New York: Berkley Books.

Chicago

Clancy Tom, . 1989. clear and present danger. New York: Berkley Books.

Harvard

Clancy T., . (1989). clear and present danger. New York: Berkley Books.

MLA

Clancy Tom, . clear and present danger. New York: Berkley Books. 1989.