The main library and faculty libraries have well organized Permanent Reference collections. These comprehensive collections consists of ready reference materials such as Dictionaries, Encyclopaedias, Yearbooks, Handbooks, Directories, Almanacs etc. and important textbooks, past questions papers and special collections. In the central library the collection is on the 1st floor. Permanent collections in the Medical and Science libraries contain materials of ready reference nature, with a bias to subject specialization.

In the medical library there are specialized pharmacopias, dictionaries and encyclopaedias, an indexed collection of Sri Lanka medical literature and publications, Index Medicus and Index Medicus of South East Asia (IMSEAR) etc. in both printed and electronic formats. Materials in these sections are released only for the purpose of taking photocopies.