Gaya APA
Hardiyatmo, H, C.
(2002).
Mekanika Tanah I
.
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Hardiyatmo, Hary,, Christady.
"Mekanika Tanah I".
Yogyakarta:
Gadjah Mada University Press,
2002.
Text.