@techreport{Office of National Statistics2021,
author = {Office of National Statistics},
title= {Sex and gender identity question development for census 2021},
year = {2021},
URL = {https://www.ons.gov.uk/census/censustransformationprogramme/questiondevelopment/sexandgenderidentityquestiondevelopmentforcensus2021},
publisher = {UK Office of National Statistics},
}