APA (7th ed.) Citation

Guernsey Books & Lyons, F. S. L. (1970). Ireland during the 17th, 18th and 19th centuries. [publisher not identified].

Chicago Style (17th ed.) Citation

Guernsey Books and F. S. L. Lyons. Ireland During the 17th, 18th and 19th Centuries. Guernsey, Channel Islands: [publisher not identified], 1970.

MLA (9th ed.) Citation

Guernsey Books and F. S. L. Lyons. Ireland During the 17th, 18th and 19th Centuries. [publisher not identified], 1970.