@article{JSSv059i10,
   author = {Hadley  Wickham},
   title = {Tidy Data},
   journal = {Journal of Statistical Software, Articles},
   volume = {59},
   number = {10},
   year = {2014},
   issn = {1548-7660},
   pages = {1--23},
   doi = {10.18637/jss.v059.i10}
}