Gunawan, Sugiharto (2016) Exploratory Study the Phenomenom of Perception and Purchasing Behaviour on Luxury Women Intimate Apparel : Victorias Secret in Surabaya. [Undergraduate thesis]
Gunawan, Sugiharto (2019) ANALISA HUBUNGAN SPIRITUALITAS DAN KEPUASAN KONSUMEN TERHADAP KUALITAS LAYANAN TRANSPORTASI BERBASIS ONLINE DENGAN PENDEKATAN SEM. Universitas Trunojoyo Madura, Madura, Jawa Timur. (In Press)