(1992). Guidelines: Development of national parks and protected areas for tourism. World Tourism Organization.
Chicago Style (17th ed.) CitationGuidelines: Development of National Parks and Protected Areas for Tourism. Madrid, Spain: World Tourism Organization, 1992.
ציטוט MLAGuidelines: Development of National Parks and Protected Areas for Tourism. World Tourism Organization, 1992.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.