To cite package ‘MicroMacroMultilevel’ in publications use:

  Lu JG, Page-Gould E, Xu NR (2017). _MicroMacroMultilevel: Micro-Macro
  Multilevel Modeling_. R package version 0.4.0,
  <https://CRAN.R-project.org/package=MicroMacroMultilevel>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {MicroMacroMultilevel: Micro-Macro Multilevel Modeling},
    author = {Jackson G Lu and Elizabeth Page-Gould and Nancy R Xu},
    year = {2017},
    note = {R package version 0.4.0},
    url = {https://CRAN.R-project.org/package=MicroMacroMultilevel},
  }