To cite the car package in publications use:
Fox J, Weisberg S (2019). An R Companion to Applied Regression, Third edition. Sage, Thousand Oaks CA. https://www.john-fox.ca/Companion/.
Corresponding BibTeX entry:
@Book{, title = {An {R} Companion to Applied Regression}, edition = {Third}, author = {John Fox and Sanford Weisberg}, year = {2019}, publisher = {Sage}, address = {Thousand Oaks {CA}}, url = {https://www.john-fox.ca/Companion/}, }