Gaya APA
Christady, H.
(2006).
Penanganan Tanah Longsor Erosi
(
Ed.1)
.
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Christady, Hardiyatmo,Hary.
"Penanganan Tanah Longsor Erosi".
Ed.1
Yogyakarta:
Gadjah Mada University Press,
2006.
Textbook.