Ulbrich, R. (1988). Irland. Brockhaus.
Cita Chicago (17th ed.)Ulbrich, Reinhard. Irland. Leipzig: Brockhaus, 1988.
Cita MLA (8th ed.)Ulbrich, Reinhard. Irland. Brockhaus, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)