Öborn, I. (1994). Morphology, chemistry, mineralogy and fertility of some acid sulfate soils in Sweden. Dept. of Soil Sciences, Swedish University of Agricultural Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Öborn, Ingrid. Morphology, Chemistry, Mineralogy and Fertility of Some Acid Sulfate Soils in Sweden. Uppsala: Dept. of Soil Sciences, Swedish University of Agricultural Sciences, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Öborn, Ingrid. Morphology, Chemistry, Mineralogy and Fertility of Some Acid Sulfate Soils in Sweden. Dept. of Soil Sciences, Swedish University of Agricultural Sciences, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.