Gaya APA
Soedarmo, G, D.
(1997).
Mekanika tanah 2
.
Yogyakata:
Kanesius.
Gaya MLA
Soedarmo, G., Djatmiko.
"Mekanika tanah 2".
Yogyakata:
Kanesius,
1997.
Printed Book.