Cooper, G. (1979). A voluntary taxn: New perspectives on sophisticated estate tax avoidance. Brookings Institution.
Chicago-referens (17:e uppl.)Cooper, George. A Voluntary Taxn: New Perspectives on Sophisticated Estate Tax Avoidance. Washington, D.C: Brookings Institution, 1979.
MLA-referens (9:e uppl.)Cooper, George. A Voluntary Taxn: New Perspectives on Sophisticated Estate Tax Avoidance. Brookings Institution, 1979.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.