Παραπομπή σε μορφή APA (7η εκδ.)

Leidner, R. (2007). The European tourism industry in the enlarged community: Gaps are potentials and opportunities. Office for Official Publications of the European Communities.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Leidner, Rudiger. The European Tourism Industry in the Enlarged Community: Gaps Are Potentials and Opportunities. Luxembourg: Office for Official Publications of the European Communities, 2007.

Παραπομπή σε μορφή MLA (8th εκδ.)

Leidner, Rudiger. The European Tourism Industry in the Enlarged Community: Gaps Are Potentials and Opportunities. Office for Official Publications of the European Communities, 2007.