Paul, R., & Elder, L. (2002). Critical thinking: Tools for taking charge of your professional and personal life. Financial Times/Prentice Hall.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Paul, Richard, و Linda Elder. Critical Thinking: Tools for Taking Charge of Your Professional and Personal Life. Upper Saddle River, NJ: Financial Times/Prentice Hall, 2002.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Paul, Richard, و Linda Elder. Critical Thinking: Tools for Taking Charge of Your Professional and Personal Life. Financial Times/Prentice Hall, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.