Five structures of bibliographic instruction programs have emerged over the past twenty years: orientation; course-related instruction; course-integrated instruction; team teaching; and, separate courses. Defined by the level of cooperation between and among librarians, departmental faculty, and university administrators, the structures can be viewed on a continuum of cooperation when planning and selecting a structure for bibliographic instruction programs. This paper presents the five structures, details the requirements for cooperation, and discusses how the structures can be used to guide the development of bibliographic instruction programs.