?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Seabright&rft.aufirst=Paul&rft.date=March+2013&rft.isbn=9780262018531&rft.title=The+Birth+of+Hierarchy&rft.btitle=Cooperation+and+Its+Evolution&rft.genre=bookitem