Gaya APA
Christady, H, H. (2015).
Mekanikan Tanah 2 Edisi Kelima .
Yogyakarta ; Indonesia:
Gadjah Mada University Press.
Gaya MLA
Christady, Hardiyatmo., Hary.
"Mekanikan Tanah 2 Edisi Kelima".
Yogyakarta ; Indonesia:
Gadjah Mada University Press,
2015.
Textbook.