APA

White T. H., . (1939). The sword in the stone. New York: G. P. Putnam's sons.

Chicago

White T H, . 1939. The sword in the stone. New York: G. P. Putnam's sons.

Harvard

White T. H., . (1939). The sword in the stone. New York: G. P. Putnam's sons.

MLA

White T H, . The sword in the stone. New York: G. P. Putnam's sons. 1939.