To cite package ‘wqtrends’ in publications use:

  Beck, M.W., de Valpine, P., Murphy, R., Wren, I., Chelsky, A., Foley,
  M., Senn, D.B. (2022). “Multi-scale trend analysis of water quality
  using error propagation of Generalized Additive Models.” _Science of
  the Total Environment_, *802*, 149927.
  doi:10.1016/j.scitotenv.2021.149927
  <https://doi.org/10.1016/j.scitotenv.2021.149927>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Multi-scale trend analysis of water quality using error propagation of Generalized Additive Models},
    author = {{Beck} and {M.W.} and {de Valpine} and {P.} and {Murphy} and {R.} and {Wren} and {I.} and {Chelsky} and {A.} and {Foley} and {M.} and {Senn} and {D.B.}},
    journal = {Science of the Total Environment},
    year = {2022},
    volume = {802},
    pages = {149927},
    doi = {10.1016/j.scitotenv.2021.149927},
  }