APA

Crocker L. G., . (1956). Public speaking for college students. New York: American Book Co.

Chicago

Crocker Lionel George, . 1956. Public speaking for college students. New York: American Book Co.

Harvard

Crocker L. G., . (1956). Public speaking for college students. New York: American Book Co.

MLA

Crocker Lionel George, . Public speaking for college students. New York: American Book Co. 1956.