Burton-Chellew, M., Ross-Gillespie, A., West, S., & Society, H. B. a. E. (2010). Cooperation in humans: Competition between groups and proximate emotions. Elsevier.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBurton-Chellew, M., A. Ross-Gillespie, S. West, और Human Behavior and Evolution Society. Cooperation in Humans: Competition Between Groups and Proximate Emotions. Elsevier, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBurton-Chellew, M., et al. Cooperation in Humans: Competition Between Groups and Proximate Emotions. Elsevier, 2010.
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