Perpustakaan UGM, i. (1997). A preliminary analysis of krakatau seismic data during the 1992/1993 eruptions. [Yogyakarta] : Universitas Gadjah Mada.
استشهاد بنمط شيكاغوPerpustakaan UGM, i-lib. A Preliminary Analysis of Krakatau Seismic Data During the 1992/1993 Eruptions. [Yogyakarta] : Universitas Gadjah Mada, 1997.
MLA استشهادPerpustakaan UGM, i-lib. A Preliminary Analysis of Krakatau Seismic Data During the 1992/1993 Eruptions. [Yogyakarta] : Universitas Gadjah Mada, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.