APA (7th ed.) Citation

Butler, J. T., Armson, R., Caron, A. H., & Stemper, J. A. (2002). User Evaluation Survey of Digital Reference Services: Methodology and Results.

Chicago Style (17th ed.) Citation

Butler, John T., Rossana Armson, Anne Hoffman Caron, and James A. Stemper. User Evaluation Survey of Digital Reference Services: Methodology and Results. 2002.

MLA (9th ed.) Citation

Butler, John T., et al. User Evaluation Survey of Digital Reference Services: Methodology and Results. 2002.