Perry, J., & Holsopple, B. (2012). The art of procrastination: A guide to effective dawdling, lollygagging, and postponing, or, getting things done by putting them off (Unabridged.). HighBridge Audio.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perry, John, و Brian Holsopple. The Art of Procrastination: A Guide to Effective Dawdling, Lollygagging, and Postponing, or, Getting Things Done by Putting Them off. Unabridged. Prince Frederick: HighBridge Audio, 2012.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Perry, John, و Brian Holsopple. The Art of Procrastination: A Guide to Effective Dawdling, Lollygagging, and Postponing, or, Getting Things Done by Putting Them off. Unabridged. HighBridge Audio, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.