Purokayo, G. S. (2015). Economic implications of transport on the Nigerian economy: A study of road transport choice and cost of doing business.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Purokayo, Gambiyo Suleiman. Economic Implications of Transport on the Nigerian Economy: A Study of Road Transport Choice and Cost of Doing Business. 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Purokayo, Gambiyo Suleiman. Economic Implications of Transport on the Nigerian Economy: A Study of Road Transport Choice and Cost of Doing Business. 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.