Duff, R. W. (2010). Retirement breakthrough: The safe, secure way to guaranteed income you can't outlive-- in any economy. Greenleaf Book Group Press.
Style de citation Chicago (17e éd.)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.
Style de citation MLA (8e éd.)Duff, Richard W. Retirement Breakthrough: The Safe, Secure Way to Guaranteed Income You Can't Outlive-- in Any Economy. Greenleaf Book Group Press, 2010.
Attention : ces citations peuvent ne pas être correctes à 100%.