To cite tuneR in publications use:
Ligges, Uwe (2011). tuneR: Analysis of music. URL: http://r-forge.r-project.org/projects/tuner/.
Corresponding BibTeX entry:
@Manual{,
title = {{tuneR}: Analysis of music},
author = {Uwe Ligges},
year = {2011},
url = {http://r-forge.r-project.org/projects/tuner/},
}