Velde, B. (1985). Clay minerals: :A physico-chemical explanation of their occurrence. Amsterdam Elsevier.
استشهاد بنمط شيكاغوVelde, B. Clay Minerals: :A Physico-chemical Explanation of Their Occurrence. New york: Amsterdam Elsevier, 1985.
MLA استشهادVelde, B. Clay Minerals: :A Physico-chemical Explanation of Their Occurrence. Amsterdam Elsevier, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.