Παραπομπή σε μορφή APA (7η εκδ.)

Herbote, B., & Kuska, V. (1999). World tourism directory (4th ed.). K. G. Saur in association with the World Tourism Organization and the World Travel & Tourism Council.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Herbote, Burkhard, και Vratislav Kuska. World Tourism Directory. 4th ed. Munchen: K. G. Saur in association with the World Tourism Organization and the World Travel & Tourism Council, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Herbote, Burkhard, και Vratislav Kuska. World Tourism Directory. 4th ed. K. G. Saur in association with the World Tourism Organization and the World Travel & Tourism Council, 1999.