@inproceedings{callison-burch-etal-2015-crowdsourcing,
    title = "Crowdsourcing for {NLP}",
    author = "Callison-Burch, Chris  and
      Ungar, Lyle  and
      Pavlick, Ellie",
    editor = "Liu, Yang  and
      Solorio, Thamar",
    booktitle = "Proceedings of the 2015 Conference of the North {A}merican Chapter of the Association for Computational Linguistics: Tutorial Abstracts",
    month = may # "{--}" # jun,
    year = "2015",
    address = "Denver, Colorado",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/N15-4002",
    doi = "10.3115/v1/N15-4002",
    pages = "2--3",
}