Abstract: A content management system allows users to capture content from content sources, such as web pages and hardcopy publications, using a client application that runs on user devices such as a personal computer or mobile device. The client application creates bibliography citations for captured content by gathering information from and/or about the content sources. Captured content and corresponding citations can be uploaded to a remote system that provides functionality for users to search for content clippings. The client application can include a document editor that facilitates importation of captured content and bibliography citations into documents being edited. In some embodiments, the system also uses social network connections between users to facilitate sharing of content.