To cite the 'metaSEM' package in publications use:

Cheung MW (2015). “metaSEM: An R Package for Meta-Analysis using Structural Equation Modeling.” Frontiers in Psychology, 5(1521). doi: 10.3389/fpsyg.2014.01521, http://journal.frontiersin.org/article/10.3389/fpsyg.2014.01521/full.

Corresponding BibTeX entry:

  @Article{,
    title = {{metaSEM}: An R Package for Meta-Analysis using Structural
      Equation Modeling},
    author = {Mike W.-L. Cheung},
    journal = {Frontiers in Psychology},
    year = {2015},
    volume = {5},
    number = {1521},
    url =
      {http://journal.frontiersin.org/article/10.3389/fpsyg.2014.01521/full},
    doi = {10.3389/fpsyg.2014.01521},
  }