Model pengelolaan kelimpahan sampah di inlet danau yang berkelanjutan (studi pada danau Kenanga di Kampus Univesitas Indonesia, Kota Depok) = Sustainable inlet lake litter abundance management model (study on Kenanga lake in University of Indonesia Campus, Depok City) / Muhammad Muhsin

Model Pengendalian Sampah Rumah Tangga Yang Berkelanjutan (Studi Pengelolaan Sampah Rumah Tangga Pada Komunitas Bank Sampah di Kota Bekasi) = Sustainable Household Solid Waste Control Models (Study of household solid waste Management at Waste Bank Community in Bekasi City)

Dampak industri pariwisata terhadap kualitas air tanah di Kuta, Bali = Impact of tourism industry on quality of ground water in Kuta, Bali

Persepsi wisatawan terhadap pengelolaan pariwisata berkelanjutan di Daerah Istimewa Yogyakarta = Tourist perceptions towards sustainable tourism management in Yogyakarta Special Region

Model pengelolaan pariwisata bahari berkelanjutan di gugus pulau kecil (Studi kasus Kepulauan Wangi-Wangi Kabupaten Wakatobi = Sustainable marine tourism management model in a small island region (Case study in Wangi-Wangi Islands Wakatobi Regency)