To cite package 'geomorph' in a publication use:

Adams, D. C., M. L. Collyer, A. Kaliontzopoulou, and E. Sherratt. 2017. Geomorph: Software for geometric morphometric analyses. R package version 3.0.5. https://cran.r-project.org/package=geomorph.

As geomorph is evolving quickly, you may want to cite also its version number (found with 'library(help = geomorph)').

Corresponding BibTeX entry:

  @Misc{,
    title = {Geomorph: Software for geometric morphometric analyses. R
      package version 3.0.5.
      https://cran.r-project.org/package=geomorph.},
    author = {D.C. Adams and M.L. Collyer and A. Kaliontzopoulou and E.
      Sherratt},
    year = {2017},
  }