APA (7th ed.) Citation

Humphreys, R. A. (1969). The Royal Historical Society 1868-1968 / by R.A. Humphreys. Royal Historical Society.

Chicago Style (17th ed.) Citation

Humphreys, R. A. The Royal Historical Society 1868-1968 / by R.A. Humphreys. Royal Historical Society, 1969.

MLA (9th ed.) Citation

Humphreys, R. A. The Royal Historical Society 1868-1968 / by R.A. Humphreys. Royal Historical Society, 1969.

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