To cite scatterplot3d in publications use:

Ligges U, M├Ąchler M (2003). “Scatterplot3d - an R Package for Visualizing Multivariate Data.” Journal of Statistical Software, 8(11), 1–20. doi:10.18637/jss.v008.i11.

Corresponding BibTeX entry:

  @Article{,
    title = {Scatterplot3d - an R Package for Visualizing Multivariate
      Data},
    author = {Uwe Ligges and Martin M{\"a}chler},
    journal = {Journal of Statistical Software},
    year = {2003},
    pages = {1--20},
    number = {11},
    volume = {8},
    doi = {10.18637/jss.v008.i11},
  }