To cite landscapemetrics or acknowledge its use, please cite this
Software note, substituting the version of the application that you
used for ‘v0.0’.

  Hesselbarth, M.H.K., Sciaini, M., With, K.A., Wiegand, K., Nowosad,
  J. 2019. landscapemetrics: an open-source R tool to calculate
  landscape metrics. - Ecography 42:1648-1657 (v0.0).

A BibTeX entry for LaTeX users is

  @Article{,
    title = {landscapemetrics: an open-source R tool to calculate landscape metrics},
    author = {Maximilian H.K. Hesselbarth and Marco Sciaini and Kimberly A. With and Kerstin Wiegand and Jakub Nowosad},
    journal = {Ecography},
    volume = {42},
    year = {2019},
    pages = {1648-1657},
  }