APA (7 वां संस्करण) प्रशस्ति पत्र
Hruschka, D. J. (2010). Friendship: Development, ecology, and evolution of a relationship. University of California Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Hruschka, Daniel J. Friendship: Development, Ecology, and Evolution of a Relationship. Berkeley: University of California Press, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Hruschka, Daniel J. Friendship: Development, Ecology, and Evolution of a Relationship. University of California Press, 2010.
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