To cite package pavo in publications use:

Maia R, Gruson H, Endler JA, White TE (2019). “pavo 2: new tools for the spectral and spatial analysis of colour in R.” Methods in Ecology and Evolution, 10(7). doi:10.1111/2041-210X.13174.

Corresponding BibTeX entry:

  @Article{,
    title = {pavo 2: new tools for the spectral and spatial analysis of
      colour in R},
    author = {Rafael Maia and Hugo Gruson and John A. Endler and Thomas
      E. White},
    journal = {Methods in Ecology and Evolution},
    year = {2019},
    volume = {10},
    number = {7},
    page = {1097-1107},
    doi = {10.1111/2041-210X.13174},
  }