To cite package ‘NBAMSeq’ in publications use:

  Ren, X., & Kuan, P. F. (2020). Negative binomial additive model for
  RNA-Seq data analysis. BMC Bioinformatics, 21(1), 1-15,
  https://doi.org/10.1186/s12859-020-3506-x

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Negative binomial additive model for RNA-Seq data analysis},
    author = {Xu Ren and Pei Fen Kuan},
    year = {2020},
    journal = {BMC Bioinformatics},
    doi = {10.1186/s12859-020-3506-x},
    volume = {21},
    number = {1},
    pages = {1--15},
  }