To cite package 'umx' in publications use:

Timothy C. Bates, Michael C. Neale, Hermine H. Maes, (under review). umx: Twin and path-based Structural Equation Modeling in OpenMx. Journal of Statistical Software,<doi:XXXX>

Timothy C. Bates [aut]. (2016). umx 1.2.7 User Guide

Timothy C. Bates (2017). umx: A helper package for Structural Equation Modeling in OpenMx. University of Edinburgh, Edinburgh, UK. doi: 10.5281/zenodo.10937, version 1.2.7, http://github.com/tbates/umx/.

BibTeX entries for LaTeX users are obtained by: toBibtex(citation('umx'))

Corresponding BibTeX entries:

  @Article{,
    title = {umx: Twin and path-based Structural Equation Modeling in
      Open{M}x},
    author = {Timothy C. Bates and Michael C. Neale and Hermine H.
      Maes},
    journal = {Journal of Statistical Software},
    publisher = {Foundation for Open Access Statistics},
    year = {under review},
  }
  @Manual{,
    title = {umx 1.2.7 User Guide},
    year = {2016},
    author = {Timothy C. Bates},
  }
  @Manual{,
    title = {umx: A helper package for Structural Equation Modeling in
      OpenMx},
    author = {{Timothy C. Bates}},
    organization = {University of Edinburgh},
    address = {Edinburgh, UK},
    year = {2017},
    note = {version 1.2.7},
    url = {http://github.com/tbates/umx/},
    doi = {10.5281/zenodo.10937},
    url = {http://github.com/tbates/umx/},
  }