To cite ppmf in publications use: Christopher T. Kenny (2021). ppmf: Read Census Privacy Protected Microdata Files. URL https://christopherkenny.github.io/ppmf. A BibTeX entry for LaTeX users is @Misc{, title = {{ppmf}: ppmf: Read Census Privacy Protected Microdata Files}, author = {Christopher T. Kenny}, url = {https://christophertkenny.com/ppmf/}, }