To cite the ecolottery package:

  Munoz et al. 2018. ecolottery: Simulating and assessing community
  assembly with environmental filtering and neutral dynamics in R

A BibTeX entry for LaTeX users is

  @Article{,
    title = {ecolottery: Simulating and assessing community assembly with environmental filtering and neutral dynamics in R},
    journal = {Methods in Ecology and Evolution},
    year = {2018},
    author = {F. Munoz and M. Grenié and P. Denelle and A. Taudière and F. Laroche and C. Tucker and C. Violle},
    volume = {9(3)},
    pages = {693-703},
  }