United States. Dept. of Labor. Pension and Welfare Benefits Administration & Reich, R. B. (1993). Trends in health benefits. Government Printing Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Dept. of Labor. Pension and Welfare Benefits Administration و Robert B. Reich. Trends in Health Benefits. Washington, D.C: Government Printing Office, 1993.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States. Dept. of Labor. Pension and Welfare Benefits Administration و Robert B. Reich. Trends in Health Benefits. Government Printing Office, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.