Cita APA

National Geographic Society. Cartographic Division. (1981). Ireland and northern Ireland: A visitor's guide. Washington: The Division.

Citación estilo Chicago

National Geographic Society. Cartographic Division. Ireland and Northern Ireland: A Visitor's Guide. Washington: The Division, 1981.

Cita MLA

National Geographic Society. Cartographic Division. Ireland and Northern Ireland: A Visitor's Guide. Washington: The Division, 1981.