The Reformed Protestantism Sources Project is divided into five major sections which contain a combination of published and unpublished material. Both Latin and vernacular editions have been filmed, and for important theologians several editions of the same work are included.

1. A Switzerland and B Geneva (640 titles)
2. Strasbourg/France (127 titles)
3. The Netherlands and Germany (269 titles)
4. England (26 titles)
5. East Friesland and North-Western Germany (144 titles)

The collection is located on the 4th Floor in the Meeter Center.