Παραπομπή APA

World Trade Organization. (1999). Sustainable development of tourism: An annotated bibliography. No. 2, November 1999. Madrid: World Trade Organization.

Παραπομπή Chicago Style

World Trade Organization. Sustainable Development of Tourism: An Annotated Bibliography. No. 2, November 1999. Madrid: World Trade Organization, 1999.

Παραπομπή MLA

World Trade Organization. Sustainable Development of Tourism: An Annotated Bibliography. No. 2, November 1999. Madrid: World Trade Organization, 1999.

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