To cite texreg in publications use:

  Leifeld, Philip (2013). texreg: Conversion of Statistical Model
  Output in R to LaTeX and HTML Tables. Journal of Statistical
  Software, 55(8), 1-24. URL https://doi.org/10.18637/jss.v055.i08

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{texreg}: Conversion of Statistical Model Output in {R} to {\LaTeX} and {HTML} Tables},
    author = {Philip Leifeld},
    journal = {Journal of Statistical Software},
    year = {2013},
    volume = {55},
    number = {8},
    pages = {1--24},
    url = {https://doi.org/10.18637/jss.v055.i08},
  }