Zulyanti, N. R. Analysis Of The Influence Of Group Social Factors, Product Information, Risk Perception And Trust On On Purchasing Decisions (Case Study of Online Shopping Students of the Faculty of Economics, Lamongan Islamic University): Analysis Of The Influence Of Group Social Factors, Product Information, Risk Perception And Trust On On Purchasing Decisions (Case Study of Online Shopping Students of the Faculty of Economics, Lamongan Islamic University). Mantik 2020, 4, 327-333.