3Anne F.Roberts & Susan G.Blandy,Library Instruction for Librarians,2nd rev.ed.(Englewood,CO: Libraries Unlimited,1989).
4Lizabeth A.Wilson."Instruction as a Reference Service." In Reference and Information Services: an Introduction,2nd ed.,general eds.:R.E.Bopp,L.C.Smith.(Englewood,Colorado: Libraries Unlimited,1995).
