Siegel, F. R. (2017). Demands of expanding populations and development planning: Clean air, safe water, fertile soils. Springer.
استشهاد بنمط شيكاغوSiegel, Frederic R. Demands of Expanding Populations and Development Planning: Clean Air, Safe Water, Fertile Soils. Springer, 2017.
MLA استشهادSiegel, Frederic R. Demands of Expanding Populations and Development Planning: Clean Air, Safe Water, Fertile Soils. Springer, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.