Griffin, A., Sheldon, B., West, S., & Naturalists, A. S. o. (2005). Cooperative breeders adjust offspring sex ratios to produce helpful helpers. University of Chicago Press.
Chicago-čujuhus (17. p.)Griffin, A., B. Sheldon, S. West, juo American Society of Naturalists. Cooperative Breeders Adjust Offspring Sex Ratios to Produce Helpful Helpers. University of Chicago Press, 2005.
MLA-čujuhus (9. p.)Griffin, A., et al. Cooperative Breeders Adjust Offspring Sex Ratios to Produce Helpful Helpers. University of Chicago Press, 2005.
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