To cite daymetr in publications use:

Hufkens K, Basler D, Milliman T, Melaas EK, Richardson AD (2018). “An integrated phenology modelling framework in R: modelling vegetation phenology with phenor.” Methods in Ecology & Evolution, 9, 1-10. doi: 10.1111/2041-210X.12970.

Corresponding BibTeX entry:

  @Article{,
    title = {An integrated phenology modelling framework in R:
      modelling vegetation phenology with {phenor}},
    author = {Koen Hufkens and David Basler and Tom Milliman and Eli K.
      Melaas and Andrew D. Richardson},
    journal = {Methods in Ecology & Evolution},
    year = {2018},
    volume = {9},
    pages = {1-10},
    doi = {10.1111/2041-210X.12970},
  }