APA

Frederick R. W., . (1938). Directing learning. N.Y: D. Appleton-Century.

Chicago

Frederick Robert Wendell, . 1938. Directing learning. N.Y: D. Appleton-Century.

Harvard

Frederick R. W., . (1938). Directing learning. N.Y: D. Appleton-Century.

MLA

Frederick Robert Wendell, . Directing learning. N.Y: D. Appleton-Century. 1938.