APA

Powers J. H., . (1987). Public speaking: the lively art. Belmont, Calif: Wadsworth Pub.

Chicago

Powers John H, . 1987. Public speaking: the lively art. Belmont, Calif: Wadsworth Pub.

Harvard

Powers J. H., . (1987). Public speaking: the lively art. Belmont, Calif: Wadsworth Pub.

MLA

Powers John H, . Public speaking: the lively art. Belmont, Calif: Wadsworth Pub. 1987.