, R., & , D. M. D. S. W. (2009). Spatial analysis of volcanic risk perception: : Case study in local community at Merapi volcano dangerous zones. [Yogyakarta] : Universitas Gadjah Mada.
استشهاد بنمط شيكاغو, RIANTO, و Dr. M.R. Djarot Sadharto Widyatmoko. Spatial Analysis of Volcanic Risk Perception: : Case Study in Local Community At Merapi Volcano Dangerous Zones. [Yogyakarta] : Universitas Gadjah Mada, 2009.
MLA استشهاد, RIANTO, و Dr. M.R. Djarot Sadharto Widyatmoko. Spatial Analysis of Volcanic Risk Perception: : Case Study in Local Community At Merapi Volcano Dangerous Zones. [Yogyakarta] : Universitas Gadjah Mada, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.