Bibliographic services are specialized resources that help individuals and organizations locate, manage, and utilize information sources. These services often include cataloging, indexing, and providing access to various types of materials, such as books, articles, and digital content. They are essential for researchers, students, and librarians in finding relevant literature and ensuring proper citation. These services can be offered by libraries, universities, and information centers, often utilizing databases and online tools. Examples of bibliographic services include Library of Congress cataloging, WorldCat for global library collections, and citation management software like Zotero or EndNote.