APA

Van Den Berg L., . (1937). Problems in teacher-training. New York: Prentice-Hall.

Chicago

Van Den Berg Lawrence, . 1937. Problems in teacher-training. New York: Prentice-Hall.

Harvard

Van Den Berg L., . (1937). Problems in teacher-training. New York: Prentice-Hall.

MLA

Van Den Berg Lawrence, . Problems in teacher-training. New York: Prentice-Hall. 1937.