@misc{indiciae753e5759566e,
  title = {Secular trends and individual differences in toilet-training progress.},
  author = {J A Martin and D R King and E E Maccoby and C N Jacklin},
  year = {1984},
  doi = {10.1093/jpepsy/9.4.457},
  url = {https://pubmed.ncbi.nlm.nih.gov/6520660/},
  note = {Source identifier: 6520660}
}