@misc{indiciaea9ac9a2b9081,
  title = {A system for recording individualized behavioral data in a token program.},
  author = {M Macdonald and K Whitfield},
  year = {1973},
  doi = {10.1901/jaba.1973.6-333},
  url = {https://pubmed.ncbi.nlm.nih.gov/16795414/},
  note = {Source identifier: 16795414}
}