To cite package ‘APAlyzer’ in publications use:

  Wang, Ruijia, and Bin Tian APAlyzer: a bioinformatic package for
  analysis of alternative polyadenylation isoforms Bioinformatics
  36(12):3907-3909 (2020)

A BibTeX entry for LaTeX users is

  @Article{,
    title = {APAlyzer: a bioinformatics package for analysis of alternative polyadenylation isoforms},
    author = {Ruijia Wang and Bin Tian},
    year = {2020},
    journal = {Bioinformatics},
    doi = {10.1093/bioinformatics/btaa266},
    volume = {36},
    issue = {12},
    pages = {-2},
  }