@article{308096,
      recid = {308096},
      author = {Pellegrini, Anthony D. and Smith, Peter K.},
      title = {The nature of play : great apes and humans /},
      publisher = {Guilford Press,},
      address = {New York :},
      pages = {x, 308 p. :},
      year = {2005},
      url = {http://library.usi.edu/record/308096},
}