Hasson, G. (2017). Positive thinking: Find happiness and achieve your goals through the power of positive thought. Capstone, A Wiley Brand.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hasson, Gill. Positive Thinking: Find Happiness and Achieve Your Goals Through the Power of Positive Thought. Chichester, West Sussex, UK: Capstone, A Wiley Brand, 2017.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Hasson, Gill. Positive Thinking: Find Happiness and Achieve Your Goals Through the Power of Positive Thought. Capstone, A Wiley Brand, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.