To cite package ‘apt’ in publications use:

Sun C (2024). apt: Asymmetric Price Transmission. R package version 4.0, https://CRAN.R-project.org/package=apt.

Corresponding BibTeX entry:

  @Manual{,
    title = {apt: Asymmetric Price Transmission},
    author = {Changyou Sun},
    year = {2024},
    note = {R package version 4.0},
    url = {https://CRAN.R-project.org/package=apt},
  }