Gaya APA
Hardiyatmo, H, C.
(2006).
Penanganan Tanah Longsor & Erosi
.
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Hardiyatmo, Hary, Christady.
"Penanganan Tanah Longsor & Erosi".
Yogyakarta:
Gadjah Mada University Press,
2006.
Text.