ABSTRACTIn a library, accreditation has a very important role in ensuring that the library has met the specified standards and guarantees the quality and accessibility of information resources for users. The purpose of this study is to describe how the National Institute of Technology Library supports Sangga Buana Library in improving its accreditation. This collaboration is a strategic step in strengthening the library’s role as a quality knowledge and information center. The method used in this research is qualitative, with a focus on direct observation in the field. Data is obtained through interviews, observation, and documentation. Data analysis technique used data reduction, presentation, and conclusion drawing and verification. The results showed that the collaboration between the National Institute of Technology Library and Sangga Buana Library has three scopes, namely the inclusion of library website links, cross-library services, and book grants with subject provisions by study programs within the university. This cooperation has run smoothly and provides great benefits for both parties. Although the implementation is not easy, both parties must maintain good coordination to continue this collaboration.Keyword: Accreditation, Cooperation, Library
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