To cite package ‘lsda’ in publications use:

  Johnson O (2026). _lsda: Course Materials for Longitudinal and
  Spatial Data Analysis_. R package version 0.2.1,
  <https://github.com/olatunjijohnson/lsda>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {lsda: Course Materials for Longitudinal and Spatial Data Analysis},
    author = {Olatunji Johnson},
    year = {2026},
    note = {R package version 0.2.1},
    url = {https://github.com/olatunjijohnson/lsda},
  }