APA (7th ed.) Citation

Historical Association & Butterfield, H. (1955). The Historical Association 1906-1956. George Philip & Son, Ltd.

Chicago Style (17th ed.) Citation

Historical Association and Herbert Butterfield. The Historical Association 1906-1956. London: George Philip & Son, Ltd, 1955.

MLA (9th ed.) Citation

Historical Association and Herbert Butterfield. The Historical Association 1906-1956. George Philip & Son, Ltd, 1955.

Warning: These citations may not always be 100% accurate.