APA (7th ed.) Citation

Humphries, P. H. (1983). Castles of Edward the First in Wales (1. publ.). [HMSO].

Chicago Style (17th ed.) Citation

Humphries, P. H. Castles of Edward the First in Wales. 1. publ. [London]: [HMSO], 1983.

MLA (9th ed.) Citation

Humphries, P. H. Castles of Edward the First in Wales. 1. publ. [HMSO], 1983.

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