@article{1400005,
      author = {Ryan, Thomas P.,},
      url = {http://library.usi.edu/record/1400005},
      title = {Sample size determination and power /},
      publisher = {John Wiley & Sons,},
      recid = {1400005},
      pages = {1 online resource (xvi, 374 pages ) :},
      address = {Hoboken, N.J. :},
      year = {2013},
}