@misc{indiciaefb0110247bf6,
  title = {Implementing the picture exchange communication system (PECS).},
  author = {K Liddle},
  year = {2001},
  doi = {10.3109/13682820109177917},
  url = {https://pubmed.ncbi.nlm.nih.gov/11340818/},
  note = {Source identifier: 11340818}
}