Gaya APA
Hardiyatmo, H, C.
(2007).
Mekanika Tanah 2
.
Yogyakarta:
gadjah mada University Press.
Gaya MLA
Hardiyatmo, Hary, Christady.
"Mekanika Tanah 2".
Yogyakarta:
gadjah mada University Press,
2007.
Text.