To cite package ‘RCM’ in publications use:

  Hawinkel S, Kerckhof F, Bijnens L, Thas O, R Core Team (????). _RCM:
  A Unified Approach to Unconstrained and Constrained Visualization of
  Microbiome Read Count Data_. R package version 1.21.0.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{RCM}: A Unified Approach to Unconstrained and Constrained Visualization of Microbiome Read Count Data},
    author = {Stijn Hawinkel and Frederiek-Maarten Kerckhof and Luc Bijnens and Olivier Thas and {R Core Team}},
    note = {R package version 1.21.0},
  }