This study seeks to report an investigation into the ways in which end-users perceived citation database interfaces (CDI). The investigation uses the Technology Acceptance Model (TAM) constructs of usefulness and ease of use to assess acceptance of citation database interfaces by university graduate students. A structural equation model was used to fit and validate the Citation Database Interface Acceptance Model (CDIAM) and the results indicate good fit to the data. The causal relationships between the constructs considered by the CDIAM are well supported, accounting for 95% of the total variance in the citation database interface acceptance and usage. This study concluded that usefulness and ease of use for citation database interface are proved to be key determinants of the acceptance and usage of citation database. This study may help explain human-computer interaction using MIS-proven TAM instead of traditional system usability approach.