To cite the 'simcdm' package in publications use:

Balamuta, J. J., Culpepper, S. A., and Hudson A. (2019) simcdm: Simulate Cognitive Diagnostic Model (CDM) Data. URL https://cran.r-project.org/package=simcdm.

Corresponding BibTeX entry:

  @Manual{,
    title = {{simcdm: Simulate Cognitive Diagnostic Model (CDM) Data}},
    author = {James Joseph Balamuta and Steven Andrew Culpepper and
      Aaron Hudson},
    year = {2019},
  }