APA (7th ed.) Citation

Watson, M. (1999). Royal families worldwide: A gazetteer. Shepheard-Walwyn.

Chicago Style (17th ed.) Citation

Watson, Mark. Royal Families Worldwide: A Gazetteer. London: Shepheard-Walwyn, 1999.

MLA (9th ed.) Citation

Watson, Mark. Royal Families Worldwide: A Gazetteer. Shepheard-Walwyn, 1999.