http://repository.uhamka.ac.id/4348/ Samsul Maarif, SMF http://repository.uhamka.ac.id/4348/1/Nilai%20Akhir%20Prosiding_Obstcle%20Construction.pdf Samsul Maarif, SMF Hasil Peer Reviu Artikel prosiding Berjudul “Obstacles in Constructing Geometrical Proofs of MathematicsTeacherStudents Based on Boero’s Proving Model”. UHAMKA. (Unpublished) Silahkan Download Disini!