@unpublished{repository2473,
            note = {Unpublished},
       publisher = {UHAMKA},
           title = {Similarity "Adult Gesture in Collaborative Mathematics Reasoning in
Different Ages"Journal of Physics: Conference Series},
             url = {http://repository.uhamka.ac.id/id/eprint/2473/},
          author = {Samsul Maarif, SMF}
}