@misc{indiciae09d71f777fc7,
  title = {Tangible self-reinforcement in self-directed behavior modification projects.},
  author = {I Kirsch},
  year = {1978},
  doi = {10.2466/pr0.1978.43.2.455},
  url = {https://pubmed.ncbi.nlm.nih.gov/724893/},
  note = {Source identifier: 724893}
}