Bereczkei, T., Dunbar, R., & Research, W. F. f. A. (2002). Helping-at-the-nest and sex-biased parental investment in a Hungarian Gypsy population. University of Chicago Press.
Chicago-viite (17. p.)Bereczkei, T., R. Dunbar, ja Wenner-Gren Foundation for Anthropological Research. Helping-at-the-nest and Sex-biased Parental Investment in a Hungarian Gypsy Population. University of Chicago Press, 2002.
MLA-viite (9. p.)Bereczkei, T., et al. Helping-at-the-nest and Sex-biased Parental Investment in a Hungarian Gypsy Population. University of Chicago Press, 2002.
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