Livingston, G., & Jenner, J. (2005). Too soon old too late smart: Thirty true things you need to know now (Unabridged.). Recorded Books Inc..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Livingston, Gordon, و James Jenner. Too Soon Old Too Late Smart: Thirty True Things You Need to Know Now. Unabridged. Prince Frederick: Recorded Books Inc., 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Livingston, Gordon, و James Jenner. Too Soon Old Too Late Smart: Thirty True Things You Need to Know Now. Unabridged. Recorded Books Inc., 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.