APA (7th ed.) Citation

Powicke, F. M., Johnson, C., & Harte, W. J. (1939). Handbook of British chronology. Offices of the Royal Historical Society.

Chicago Style (17th ed.) Citation

Powicke, F. M., Charles Johnson, and W. J. Harte. Handbook of British Chronology. London: Offices of the Royal Historical Society, 1939.

MLA (9th ed.) Citation

Powicke, F. M., et al. Handbook of British Chronology. Offices of the Royal Historical Society, 1939.

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