Kusmana, Cecep, Departemen Sivikultur, Fakultas Kehutanan IPB, Indonesia, Indonesia

• Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 10 No. 1 (2020): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan - Articles
  Strategy and policy in the management of Sumatran Orangutan (Pongo abelii) conservation tourism on the Lawang Hill in the Langkat district of North Sumatera
  Abstract  pdf (Bahasa Indonesia)