Sarkar, P. (1994). Longterm behaviour of terms of trade of primary products vis-a-vis manufactures: A critical review of recent debate. Centre for Studies in Social Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sarkar, Prabirjit. Longterm Behaviour of Terms of Trade of Primary Products Vis-a-vis Manufactures: A Critical Review of Recent Debate. Calcutta: Centre for Studies in Social Sciences, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sarkar, Prabirjit. Longterm Behaviour of Terms of Trade of Primary Products Vis-a-vis Manufactures: A Critical Review of Recent Debate. Centre for Studies in Social Sciences, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.