This study applies citation analysis techniques to characterize the information use among faculty members of four departments (Science, Engineering, Social Sciences and Humanities) at the Pontifical Catholic University of Peru (PUCP). A random sample of 217 research outputs was obtained from 2010-2014 faculty publications that were indexed by Scopus. Cited references were gathered and categorized by type and language, and their number and age were computed. Differences were found between departments. Considering the results, it is argued that the discipline itself is a major determinant of the information behavior of academics.