British Library, National Central Library (Great Britain), Gascoigne J, & Porter, K. I. (1977). British union-catalogue of periodicals: Incorporating world list of scientific periodicals. Butterworths.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)British Library, National Central Library (Great Britain), Gascoigne J, و Kenneth I. Porter. British Union-catalogue of Periodicals: Incorporating World List of Scientific Periodicals. London: Butterworths, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)British Library, et al. British Union-catalogue of Periodicals: Incorporating World List of Scientific Periodicals. Butterworths, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.