 @Manual{muller2018,
    title = {tibble: Simple Data Frames},
    author = {Kirill Müller and Hadley Wickham},
    year = {2018},
    note = {R package version 1.4.2},
    url = {https://CRAN.R-project.org/package=tibble},
  }
  
  
@Manual{ons1981,
    title = {Nomis: Official Labour Market Statistics},
    author = {{Office for National Statistics}},
    year = {1981},
    url = {https://www.nomisweb.co.uk/},
  }
  
  @Manual{henry2018,
    title = {rlang: Functions for Base Types and Core R and 'Tidyverse' Features},
    author = {Lionel Henry and Hadley Wickham},
    year = {2018},
    note = {R package version 0.2.1},
    url = {https://CRAN.R-project.org/package=rlang},
  }