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.