To cite package ‘mMARCH.AC’ in publications use:

  Guo W, Leroux A, Zipunnikov V, Merikangas K (2023). _mMARCH.AC:
  Processing of Accelerometry Data with 'GGIR' in mMARCH_. R package
  version 2.9.2.0, <https://github.com/weiguonimh/mmarch.ac>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mMARCH.AC: Processing of Accelerometry Data with 'GGIR' in mMARCH},
    author = {Wei Guo and Andrew Leroux and Vadim Zipunnikov and Kathleen Merikangas},
    year = {2023},
    note = {R package version 2.9.2.0},
    url = {https://github.com/weiguonimh/mmarch.ac},
  }