Piper, M. (2016). Can I retire?: How much money you need to retire and how to manage your retirement savings, explained in 100 pages or less. Simple Subjects, LLC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Piper, Mike. Can I Retire?: How Much Money You Need to Retire and How to Manage Your Retirement Savings, Explained in 100 Pages or Less. [United States]: Simple Subjects, LLC, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Piper, Mike. Can I Retire?: How Much Money You Need to Retire and How to Manage Your Retirement Savings, Explained in 100 Pages or Less. Simple Subjects, LLC, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.