APA

Boardman F. W., . (1957). Castles. New York: H. Z. Walck.

Chicago

Boardman Fon Wyman, . 1957. Castles. New York: H. Z. Walck.

Harvard

Boardman F. W., . (1957). Castles. New York: H. Z. Walck.

MLA

Boardman Fon Wyman, . Castles. New York: H. Z. Walck. 1957.