APA Style

Smith, L, C., Bopp, R, E. (2001). Reference and information services an introduction / Richard E.Bopp (Cet.3). Sebastopol, CA: Libraries Unlimited.

MLA Style

Smith, Linda, C.., Bopp, Richard, E.. "Reference and information services an introduction / Richard E.Bopp". Cet.3 Sebastopol, CA: Libraries Unlimited, 2001. Text.