To cite package ‘PoissonPCA’ in publications use:

  Kenney T, Huang T, Gu H (2019). “SEMI-PARAMETRIC PRINCIPAL COMPONENT
  ANALYSIS FOR POISSON COUNT DATA WITH APPLICATION TO MICROBIOME DATA
  ANALYSIS.” http://arxiv.org/abs/1904.11745.

A BibTeX entry for LaTeX users is

  @Unpublished{,
    title = {SEMI-PARAMETRIC PRINCIPAL COMPONENT ANALYSIS FOR
POISSON COUNT DATA WITH APPLICATION TO MICROBIOME DATA ANALYSIS},
    author = {Toby Kenney and Tianshu Huang and Hong Gu},
    year = {2019},
    note = {http://arxiv.org/abs/1904.11745},
  }