Gaya APA
Hardiyatmo, H, C.
(2006).
Penanganan tanah longsor & erosi
(
1)
.
Yogyakarta:
Gajah Madah University.
Gaya MLA
Hardiyatmo, Hary, Christady.
"Penanganan tanah longsor & erosi".
1
Yogyakarta:
Gajah Madah University,
2006.
Text.