Accountants International Study Group. (1977). Accounting for pension costs: Current practices in Canada, the United Kingdom, and the United States. Accountants International Study Group.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Accountants International Study Group. Accounting for Pension Costs: Current Practices in Canada, the United Kingdom, and the United States. [S.l.]: Accountants International Study Group, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Accountants International Study Group. Accounting for Pension Costs: Current Practices in Canada, the United Kingdom, and the United States. Accountants International Study Group, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.