Okami, P., and Shackelford, T. K. (2001). Human sex differences in sexual psychology and behavior. Annual Review of Sex Research.
O’Neill, N., and O’Neill, G. (1972/1984). Open Marriage: A New Life Style for Couples. New York: M. Evans and Company.
Ostrom, E. (2009). A general framework for analizing sustainability of ecological systems. Science, 325: 419-422.
Parker, G. A. (1984). Sperm competition. In R. L. Smith (Ed.), Sperm Competition and Animal Mating Systems. New York: Academic Press.
Perel, E. (2006). Mating in Captivity: Reconciling the Erotic and the Domestic. New York: HarperCollins.
Pinker, S. (1997). Letter to the Editor of New York Review of Books on Gould. Retrieved January 22, 2002 from http://www.mit.edu/~pinker/GOULD.html.
_ (2002). The Blank Slate: The Modern Denial of
Human Nature. New York: Viking Press.
Pochron, S., and Wright, P. (2002). Dynamics of testis size compensates for variation in male body size. Evolutionary Ecology Research, 4: 577-585.
Pollock, D. (2002). Partible paternity and multiple maternity among the Kulina. In S. Beckerman and P. Valentine (Eds.), Cultures of Multiple Fathers: The Theory and Practice of Partible Paternity in Lowland South America (pp. 42-61). Gainesville: University Press of Florida.
Potts, M., and Short, R. (1999). Ever since Adam and Eve: The Evolution of Human Sexuality. Cambridge, UK: Cambridge University Press.
Potts, R. (1992). The hominid way of life. In Jones, S., Martin, R. D., and Pilbeam, D. (Eds.) (1992). The Cambridge Encyclopedia of Human Evolution. Cambridge, UK: Cambridge University Press, pp. 325-334.
Pound, N. (2002). Male interest in visual cues of sperm competition risk. Evolution and Human Behavior, 23: 443-466.
Power, M. (1991). The Egalitarians: Human and
Chimpanzee. Cambridge, UK: Cambridge University Press.
Pradhan, G. R., et al. (2006). The evolution of female copulation calls in primates: A review and a new model. Behavioral Ecology and Sociobiology, 59(3): 333-343.
Prescott, J. (1975). Body pleasure and the origins of violence. Bulletin of the Atomic Scientists, November: 10-20.
Pusey, A. E. (2001). Of apes and genes. In F. M. de Waal (Ed.), Tree of Origin: What Primate Behavior Can Tell Us About Human Social Evolution. Cambridge, MA: Harvard University Press.
Quammen, D. (2006). The Reluctant Mr. Darwin: An Intimate Portrait of Charles Darwin and the Making of His Theory of Evolution. New York: Norton.
Quinn, D. (1995). Ishmael: An Adventure of the Mind and Spirit. New York: Bantam Books.
