(1982). Field extract of soil taxonomy: The 1975 system of soil classification of the U.S.D.A./S.C.S. The Netherland: International Soil museum.
استشهاد بنمط شيكاغوField Extract of Soil Taxonomy: The 1975 System of Soil Classification of the U.S.D.A./S.C.S. The Netherland: International Soil museum, 1982.
MLA استشهادField Extract of Soil Taxonomy: The 1975 System of Soil Classification of the U.S.D.A./S.C.S. The Netherland: International Soil museum, 1982.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.