To cite package 'rio' in publications use:
Chung-hong Chan, Geoffrey CH Chan, Thomas J. Leeper, and Jason Becker (2018). rio: A Swiss-army knife for data file I/O. R package version 0.5.16.
Corresponding BibTeX entry:
@Manual{, title = {rio: A Swiss-army knife for data file I/O}, author = {Chung-hong Chan and Geoffrey CH Chan and Thomas J. Leeper and Jason Becker}, year = {2018}, note = {R package version 0.5.16}, }