APA (7th ed.) Citation

Parry, C., & Hopkins, C. (1970). An index of British treaties, 1101-1968. H.M.S.O..

Chicago Style (17th ed.) Citation

Parry, Clive, and Charity Hopkins. An Index of British Treaties, 1101-1968. London: H.M.S.O., 1970.

MLA (9th ed.) Citation

Parry, Clive, and Charity Hopkins. An Index of British Treaties, 1101-1968. H.M.S.O., 1970.

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