This citation analysis examines the availability of 1313 citations from student research posters across multiple disciplines at a mid-sized university. The study focuses on whether the cited materials are available via the library or freely online. Results indicate only one-fifth of citations were from library proprietary sources while two-thirds were freely available online. Resource age and discipline also influence availability. This study informs collection development decisions and instruction services and helps define the library’s role of providing information and facilitating information access.