To cite the package 'iccbeta' in publications use:

  Culpepper, S. A. and Agunis, H. (2015). iccbeta: Multilevel Model
  Intraclass Correlation for Slope Heterogeneity. URL
  https://cran.r-project.org/package=iccbeta.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{iccbeta: Multilevel Model Intraclass Correlation for Slope Heterogeneity}},
    author = {Steven Andrew Culpepper and Herman Agunis},
    year = {2015},
  }

  Agunis, H. & Culpepper, S. A. (2015). An expanded decision making
  procedure for examining cross-level interaction effects with
  multilevel modeling. Organizational Research Methods.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {An expanded decision making procedure for examining cross-level interaction effects with multilevel modeling},
    author = {Herman Aguinis and Steven Andrew Culpepper},
    journal = {Organization Research Methods},
    year = {2015},
    url = {http://www.hermanaguinis.com/pubs.html},
    pdf = {http://www.hermanaguinis.com/ORM2015.pdf},
    doi = {10.1177/1094428114563618},
  }