To cite package ‘huttenlocher1991’ in publications use:

Huttenlocher J, Haight W, Bryk A, Seltzer M, Lyons T (2022). huttenlocher1991: Vocabulary growth in 22 infants (Huttenlocher et al., 1991). R package version 0.1.0, https://github.com/tjmahr/huttenlocher1991.

Corresponding BibTeX entry:

  @Manual{,
    title = {huttenlocher1991: Vocabulary growth in 22 infants
      (Huttenlocher et al., 1991)},
    author = {Janellen Huttenlocher and Wendy Haight and Anthony Bryk
      and Michael Seltzer and Thomas Lyons},
    year = {2022},
    note = {R package version 0.1.0},
    url = {https://github.com/tjmahr/huttenlocher1991},
  }