Παραπομπή APA

World Tourism Organization. (1999). Guide for local authorities on developing sustainable tourism: Supplementary volume on Sub-Saharan Africa. Madrid, Spain: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Guide for Local Authorities On Developing Sustainable Tourism: Supplementary Volume On Sub-Saharan Africa. Madrid, Spain: World Tourism Organization, 1999.

Παραπομπή MLA

World Tourism Organization. Guide for Local Authorities On Developing Sustainable Tourism: Supplementary Volume On Sub-Saharan Africa. Madrid, Spain: World Tourism Organization, 1999.

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