@article{81539,
      author = {Cofer, Charles Norval. and Appley, Mortimer H.},
      url = {http://library.usi.edu/record/81539},
      title = {Motivation: theory and research},
      publisher = {Wiley},
      recid = {81539},
      pages = {958 p.},
      address = {New York,},
      year = {1964},
}