To cite textshape in publications, please use:

Rinker, T. W. (2018). textshape: Tools for Reshaping Text version 1.6.0. Buffalo, New York. https://github.com/trinker/textshape

Corresponding BibTeX entry:

  @Manual{,
    title = {{textshape}: Tools for Reshaping Text},
    author = {Tyler W. Rinker},
    address = {Buffalo, New York},
    note = {version 1.6.0},
    year = {2018},
    url = {https://github.com/trinker/textshape},
  }