National Council of Applied Economic Research & Roy, T. K. (1974). Employment in road transport and road construction. National Council of Applied Economic Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Council of Applied Economic Research و T. K. Roy. Employment in Road Transport and Road Construction. New Delhi: National Council of Applied Economic Research, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Council of Applied Economic Research و T. K. Roy. Employment in Road Transport and Road Construction. National Council of Applied Economic Research, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.