SpringerLink (Online service), Delhey, J., & Brockmann, H. (2013). Human happiness and the pursuit of maximization: Is more always better? Springer Netherlands.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)SpringerLink (Online service), Jan Delhey, و Hilke Brockmann. Human Happiness and the Pursuit of Maximization: Is More Always Better? Dordrecht: Springer Netherlands, 2013.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)SpringerLink (Online service), et al. Human Happiness and the Pursuit of Maximization: Is More Always Better? Springer Netherlands, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.