To cite package ‘idealstan’ in publications use:

  Kubinec R (2018). “Generalized Ideal Point Models for Time-Varying
  and Missing-Data Inference.” Working Paper.

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {Generalized Ideal Point Models for Time-Varying and Missing-Data Inference},
    author = {Robert Kubinec},
    note = {Working Paper},
    year = {2018},
  }