To cite package ‘LVGP’ in publications use:

  Tao S, Zhang Y, Apley D, Chen W (2026). _LVGP: Latent Variable
  Gaussian Process Modeling with Qualitative and Quantitative Input
  Variables_. R package version 2.1.6,
  <https://CRAN.R-project.org/package=LVGP>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {LVGP: Latent Variable Gaussian Process Modeling with Qualitative and
Quantitative Input Variables},
    author = {Siyu Tao and Yichi Zhang and Daniel W. Apley and Wei Chen},
    year = {2026},
    note = {R package version 2.1.6},
    url = {https://CRAN.R-project.org/package=LVGP},
  }