To cite package ‘EthSEQ’ in publications use:

  Davide Dalfovo, Alessandro Romanel; Analysis of Genetic Ancestry from
  NGS Data Using EthSEQ. Current Protocols 2023. doi: 10.1002/cpz1.663

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Analysis of Genetic Ancestry from NGS Data Using EthSEQ},
    journal = {Current Protocols},
    year = {2023},
    author = {Davide Dalfovo and Alessandro Romanel},
  }

  Alessandro Romanel, Tuo Zhang, Olivier Elemento, Francesca
  Demichelis; EthSEQ: ethnicity annotation from whole exome sequencing
  data. Bioinformatics 2017. doi: 10.1093/bioinformatics/btx165

A BibTeX entry for LaTeX users is

  @Article{,
    title = {EthSEQ: ethnicity annotation from whole exome sequencing data},
    journal = {Bioinformatics},
    year = {2017},
    author = {Alessandro Romanel and Tuo Zhang and Olivier Elemento and Francesca Demichelis},
  }