Bird, R. M., & Oldman, O. (1964). Readings on taxation in developing countries. Johns Hopkins Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bird, Richard M., و Oliver Oldman. Readings on Taxation in Developing Countries. Baltimore: Johns Hopkins Press, 1964.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Bird, Richard M., و Oliver Oldman. Readings on Taxation in Developing Countries. Johns Hopkins Press, 1964.