Singer, C. (1948). The earliest chemical Industry: An essay in the historical relations of economics & technology illustrated from the alum trade / Charles Singer. The Folio Society.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Singer, Charles. The Earliest Chemical Industry: An Essay in the Historical Relations of Economics & Technology Illustrated from the Alum Trade / Charles Singer. London: The Folio Society, 1948.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Singer, Charles. The Earliest Chemical Industry: An Essay in the Historical Relations of Economics & Technology Illustrated from the Alum Trade / Charles Singer. The Folio Society, 1948.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.