Soewarno, S., & Yuningsih, S. (2004). Hydrological Characteristics of Kaligarang Watershed. Universitas Muhammadiyah Surakarta.
Čikaški stil citiranja (17. izdanje)Soewarno, Soewarno, i Srimulat Yuningsih. Hydrological Characteristics of Kaligarang Watershed. Universitas Muhammadiyah Surakarta, 2004.
MLA način citiranja (9. izdanje)Soewarno, Soewarno, i Srimulat Yuningsih. Hydrological Characteristics of Kaligarang Watershed. Universitas Muhammadiyah Surakarta, 2004.
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