APA

Lucas S., . (1995). The art of public speaking. New York: McGraw-Hill.

Chicago

Lucas Stephen, . 1995. The art of public speaking. New York: McGraw-Hill.

Harvard

Lucas S., . (1995). The art of public speaking. New York: McGraw-Hill.

MLA

Lucas Stephen, . The art of public speaking. New York: McGraw-Hill. 1995.