APA (7th ed.) Citation

Coleman, V., Hambric, L., Fos, D., & Ishaq, F. (1997). Tiered Reference Services: A Survey.

Chicago Style (17th ed.) Citation

Coleman, Vicki, Lynne Hambric, Dorothy Fos, and Fatimah Ishaq. Tiered Reference Services: A Survey. 1997.

MLA (9th ed.) Citation

Coleman, Vicki, et al. Tiered Reference Services: A Survey. 1997.