APA

Brown H., . (19561954). The challenge of man's future: an inquiry concerning the condition of man during the years that lie ahead. New York: Viking Press.

Chicago

Brown Harrison, . 19561954. The challenge of man's future: an inquiry concerning the condition of man during the years that lie ahead. New York: Viking Press.

Harvard

Brown H., . (19561954). The challenge of man's future: an inquiry concerning the condition of man during the years that lie ahead. New York: Viking Press.

MLA

Brown Harrison, . The challenge of man's future: an inquiry concerning the condition of man during the years that lie ahead. New York: Viking Press. 19561954.