APA (7th ed.) Citation

Burnham, H. (1995). Clwyd and Powys / Helen Burnham. HMSO.

Chicago Style (17th ed.) Citation

Burnham, Helen. Clwyd and Powys / Helen Burnham. London: HMSO, 1995.

MLA (9th ed.) Citation

Burnham, Helen. Clwyd and Powys / Helen Burnham. HMSO, 1995.

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