Nunberg, B., Barbone, L., & Derlien, H. (1999). The state after communism: Administrative transitions in Central and Eastern Europe. World Bank.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Nunberg, Barbara, Luca Barbone, و Hans-Ulrich Derlien. The State After Communism: Administrative Transitions in Central and Eastern Europe. Washington, D.C.: World Bank, 1999.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Nunberg, Barbara, et al. The State After Communism: Administrative Transitions in Central and Eastern Europe. World Bank, 1999.