@unpublished{repository12001,
       publisher = {UHAMKA},
            note = {Unpublished},
           title = {Peer Reviu\_Obstacles in Constructing Geometrical Proofs of Mathematics-TeacherStudents Based on Boero's Proving Model},
             url = {http://repository.uhamka.ac.id/id/eprint/12001/},
          author = {Samsul Maarif, SMF}
}