(1997). Natural resources development: Focus: tropical. Gernamy: The institute for Scientific Co-operation.
استشهاد بنمط شيكاغوNatural Resources Development: Focus: Tropical. Gernamy: The institute for Scientific Co-operation, 1997.
MLA استشهادNatural Resources Development: Focus: Tropical. Gernamy: The institute for Scientific Co-operation, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.