APA Edition Citation

Bopp, R. E., & Smith , L. C. (2011). Reference and information services: An introduction (4th ed.). Libraries Unlimited.

Chicago Edition Citation

Bopp, Richard E., and L. C. Smith. Reference and Information Services: An Introduction. 4th ed. Oxford: Libraries Unlimited, 2011.

MLA Edition Citation

Bopp, Richard E., and L. C. Smith. Reference and Information Services: An Introduction. 4th ed. Libraries Unlimited, 2011.