Gaya APA

Hardiyatmo, H, C. (2006). Mekanika Tanah 1 (4). Yogyakarta: Gadjah Mada University Press.

Gaya MLA

Hardiyatmo, Hary, Christady. "Mekanika Tanah 1". 4 Yogyakarta: Gadjah Mada University Press, 2006. Text.