Encyclopedias
- Oxford Dictionary of the Christian Church (online)Uniquely authoritative and wide-ranging in its scope, this is an indispensable reference work on all aspects of the Christian Church. The print edition is in Watzek as well.
- Catholic Encyclopedia (online)1904 online edition of the Catholic Encyclopedia.
- New Catholic Encyclopedia15 volume print encyclopedia (2003).
- Dictionary of the Middle Ages13 volume print encyclopedia in the reference section of Watzek.
