To cite mcglm in publications use:

Bonat WH (2018). “Multiple Response Variables Regression Models in R: The mcglm Package.” Journal of Statistical Software, 84(4), 1–30. doi:10.18637/jss.v084.i04.

Corresponding BibTeX entry:

  @Article{,
    title = {Multiple Response Variables Regression Models in {R}: The
      {mcglm} Package},
    author = {Wagner Hugo Bonat},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {84},
    number = {4},
    pages = {1--30},
    doi = {10.18637/jss.v084.i04},
  }