Siregar, Riadi Syafutra and Baiduri, Ratih and Sibarani, Robert (2017) THE ETHNIC MANDAILING TRADITION OF COURTSHIP (MARKUSIP) AND REVITALIZATION EFFORTS IN THE FORMATION OF THE CHARACTER YOUTH. In: The 2nd Annual International Seminar on Transformative Education and Educational Leadership (AISTEEL) 2017, 16-17 Oktober 2017, Medan.