Radl, J. (2013). Retirement timing and social stratification: A comparative study of labor market exit and age norms in Western Europe. Versita.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Radl, Jonas. Retirement Timing and Social Stratification: A Comparative Study of Labor Market Exit and Age Norms in Western Europe. London: Versita, 2013.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Radl, Jonas. Retirement Timing and Social Stratification: A Comparative Study of Labor Market Exit and Age Norms in Western Europe. Versita, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.