Dunbar, R., Cornah, L., Daly, F., & Bowyer, K. (2002). Vigilance in human groups: A test of alternative hypotheses.
Lua i Stíl Chicago (17ú heag.)Dunbar, R., L. Cornah, F. Daly, agus K. Bowyer. Vigilance in Human Groups: A Test of Alternative Hypotheses. 2002.
Lua MLA (9ú heag.)Dunbar, R., et al. Vigilance in Human Groups: A Test of Alternative Hypotheses. 2002.
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