This commitment was initially developed by Felix Schönbrodt, Markus Maier, Moritz Heene, and Michael Zehetleitner at the Ludwig-Maximilians-University Munich. In subsequent discussions with new signatories the wording was refined.
If you want to cite the commitment, please use:
Schönbrodt, F. D., Maier, M., Heene, M., & Zehetleitner, M. (2015). Voluntary commitment to research transparency. Retrieved from http://www.researchtransparency.org