Duff, R. W. (2010). Retirement breakthrough: The safe, secure way to guaranteed income you can't outlive-- in any economy. Greenleaf Book Group Press.
Цитирование в стиле Чикаго (17-е изд.)Duff, Richard W. Retirement Breakthrough: The Safe, Secure Way to Guaranteed Income You Can't Outlive-- in Any Economy. Austin, Texas: Greenleaf Book Group Press, 2010.
Цитирование MLA (8-е изд.)Duff, Richard W. Retirement Breakthrough: The Safe, Secure Way to Guaranteed Income You Can't Outlive-- in Any Economy. Greenleaf Book Group Press, 2010.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.