Cita APA (7th ed.)

Somerville, C. (2010). National Geographic traveler: Ireland (Third edition.). National Geographic Society.

Cita Chicago (17th ed.)

Somerville, Christopher. National Geographic Traveler: Ireland. Third edition. Washington, D.C: National Geographic Society, 2010.

Cita MLA (9th ed.)

Somerville, Christopher. National Geographic Traveler: Ireland. Third edition. National Geographic Society, 2010.