Wolf, B. (2003). Sustainable soils: The place of organic matter in sustaining soils and their productivity. New York: Food Products Press.
استشهاد بنمط شيكاغوWolf, Benjamin. Sustainable Soils: The Place of Organic Matter in Sustaining Soils and Their Productivity. New York: Food Products Press, 2003.
MLA استشهادWolf, Benjamin. Sustainable Soils: The Place of Organic Matter in Sustaining Soils and Their Productivity. New York: Food Products Press, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.