, V., & , D. A. I. (2010). Geology and vharacteristics of ore mineral deposits at Slahung area, Ponorogo regency east java, Indonesia. [Yogyakarta] : Universitas Gadjah Mada.
Chicago Style Citation, VISAIPHONE, and Dr. Arifudin Idrus. Geology and Vharacteristics of Ore Mineral Deposits At Slahung Area, Ponorogo Regency East Java, Indonesia. [Yogyakarta] : Universitas Gadjah Mada, 2010.
MLA引文, VISAIPHONE, and Dr. Arifudin Idrus. Geology and Vharacteristics of Ore Mineral Deposits At Slahung Area, Ponorogo Regency East Java, Indonesia. [Yogyakarta] : Universitas Gadjah Mada, 2010.
警告：這些引文格式不一定是100％准確.