reference library 
noun
A library, typically one holding many reference books, in which the books are not for loan but may be read on site.Why not do all that at its present site, where it is close to the reference library, the Minster library and the art gallery?...
- The biggest reference library was the Lenin Library in Moscow, developed from an 1862 foundation.
- After joining the service in 1966, Mrs Lord has worked in the central children's library, the reference library and has been a branch librarian.