Gaya APA
Hardiyatmo, H, C., Press, T, U. (2018).
Mekanika tanah 2 edisi keenam (Edisi 6).
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Hardiyatmo, Hary, Christady., Press, Tim, UGM.
"Mekanika tanah 2 edisi keenam".
Edisi 6
Yogyakarta:
Gadjah Mada University Press,
2018.
Text.