Παραπομπή σε μορφή APA (7η εκδ.)

Koumelis, T. A. (1998). Tourism exhibitions directory: The unique annual guide to travel & tourism fairs and exhibitions 1998-1999. Interbooks.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Koumelis, Theodore A. Tourism Exhibitions Directory: The Unique Annual Guide to Travel & Tourism Fairs and Exhibitions 1998-1999. Athens: Interbooks, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Koumelis, Theodore A. Tourism Exhibitions Directory: The Unique Annual Guide to Travel & Tourism Fairs and Exhibitions 1998-1999. Interbooks, 1998.