SpringerLink (Online service), Delhey, J., & Brockmann, H. (2013). Human happiness and the pursuit of maximization: Is more always better? Springer Netherlands.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpringerLink (Online service), Jan Delhey, और Hilke Brockmann. Human Happiness and the Pursuit of Maximization: Is More Always Better? Dordrecht: Springer Netherlands, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpringerLink (Online service), et al. Human Happiness and the Pursuit of Maximization: Is More Always Better? Springer Netherlands, 2013.
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