To cite package ‘phonfieldwork’ in publications use:

  Moroz G (2023). “Phonetic fieldwork research and experiments with the
  R package phonfieldwork.” In Kobozeva I, Semyonova K, Kostyuk A,
  Zakharov L, Svetozarova N (eds.), _«…Vperyod i vverkh po lestnitse
  zvuchashey». Sbornik statye k 80-letiyu Olgi Fyodorovny Krivnovoy
  [Festschrift in memoriam to Olga Fyodorovna Krivnova]_. Buki Vedi,
  Moscow.

A BibTeX entry for LaTeX users is

  @InCollection{,
    title = {Phonetic fieldwork research and experiments with the R package phonfieldwork},
    author = {George Moroz},
    year = {2023},
    booktitle = {«…Vperyod i vverkh po lestnitse zvuchashey». Sbornik statye k 80-letiyu Olgi Fyodorovny Krivnovoy [Festschrift in memoriam to Olga Fyodorovna Krivnova]},
    editor = {I. M. Kobozeva and K. P. Semyonova and A. E. Kostyuk and L. M. Zakharov and N. D. Svetozarova},
    publisher = {Buki Vedi},
    address = {Moscow},
  }

  Moroz G (2020). _Phonetic fieldwork and experiments with
  phonfieldwork package_.
  <https://CRAN.R-project.org/package=phonfieldwork>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Phonetic fieldwork and experiments with phonfieldwork package},
    author = {George Moroz},
    year = {2020},
    url = {https://CRAN.R-project.org/package=phonfieldwork},
  }