Beveridge, W. H. B., & Wells, A. F. (1949). The evidence for voluntary action, being memoranda by organisations and individuals, and other material relevant to voluntary action. George Allen and Unwin.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Beveridge, William Henry Beveridge, و Alan Frank Wells. The Evidence for Voluntary Action, Being Memoranda by Organisations and Individuals, and Other Material Relevant to Voluntary Action. London: George Allen and Unwin, 1949.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Beveridge, William Henry Beveridge, و Alan Frank Wells. The Evidence for Voluntary Action, Being Memoranda by Organisations and Individuals, and Other Material Relevant to Voluntary Action. George Allen and Unwin, 1949.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.