MLA

Berriedale Keith, Arthur. Constitutional Law, Being the Seventh Edition of Ridge's Constitutional Law of England. London: Stevens and Sons, 1939.

APA

Berriedale Keith, A. (1939). Constitutional law, being the seventh edition of Ridge's Constitutional law of England. London: Stevens and Sons.

Chicago

Berriedale Keith, Arthur Constitutional Law, Being the Seventh Edition of Ridge's Constitutional Law of England. London: Stevens and Sons, 1939.