To cite 'smqf' in publications use:

  Ardia, D. (2026). Statistical Methods for Quantitative Finance. CRC
  Press.

A BibTeX entry for LaTeX users is

  @Book{,
    title = {Statistical Methods for Quantitative Finance},
    author = {David Ardia},
    year = {2026},
    publisher = {CRC Press},
  }

  Ardia, D. (2026). smqf: Statistical Methods for Quantitative Finance.
  R package companion to Ardia (2026), CRC Press.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {smqf: Statistical Methods for Quantitative Finance},
    author = {David Ardia},
    year = {2026},
    note = {R package companion to Ardia (2026), CRC Press},
  }