, P., & , D. H. H. (2005). Hydrogeochemical study of the Ungaran Geothermal System, Central Java, Indonesia. [Yogyakarta] : Universitas Gadjah Mada.
Chicago Style Citation, PHUONG, and Dr.Ir. Heru Hendrayana. Hydrogeochemical Study of the Ungaran Geothermal System, Central Java, Indonesia. [Yogyakarta] : Universitas Gadjah Mada, 2005.
MLA引文, PHUONG, and Dr.Ir. Heru Hendrayana. Hydrogeochemical Study of the Ungaran Geothermal System, Central Java, Indonesia. [Yogyakarta] : Universitas Gadjah Mada, 2005.
警告：這些引文格式不一定是100％准確.