Παραπομπή σε μορφή APA (7η εκδ.)

World Tourism Organization. (2011). The Spanish outbound travel market to Africa and the Middle East. World Tourism Organization.

Παραπομπή σε μορφή Chicago (17η εκδ.)

World Tourism Organization. The Spanish Outbound Travel Market to Africa and the Middle East. Spain: World Tourism Organization, 2011.

Παραπομπή σε μορφή MLA (9th εκδ.)

World Tourism Organization. The Spanish Outbound Travel Market to Africa and the Middle East. World Tourism Organization, 2011.