Ramos O'hara, J. A. (1996). Indicators of environmental impact: Plan of the improvement of the high watershed of the Virilla river, Costa Rica.
استشهاد بنمط شيكاغوRamos O'hara, Jorge A. Indicators of Environmental Impact: Plan of the Improvement of the High Watershed of the Virilla River, Costa Rica. 1996.
MLA استشهادRamos O'hara, Jorge A. Indicators of Environmental Impact: Plan of the Improvement of the High Watershed of the Virilla River, Costa Rica. 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.