Bengen, W. P. (2025). A richer retirement: Supercharging the 4% rule to spend more and enjoy more. Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBengen, William P. A Richer Retirement: Supercharging the 4% Rule to Spend More and Enjoy More. Hoboken, New Jersey: Wiley, 2025.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBengen, William P. A Richer Retirement: Supercharging the 4% Rule to Spend More and Enjoy More. Wiley, 2025.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.