watkin, E. (1964). cost plus and full cost pricing techniques in a public enterprise. the institute of national planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)watkin, E.E. Cost Plus and Full Cost Pricing Techniques in a Public Enterprise. cairo: the institute of national planning, 1964.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)watkin, E.E. Cost Plus and Full Cost Pricing Techniques in a Public Enterprise. the institute of national planning, 1964.