Gaya APA

Christady, H, H. (2012). Mekanika Tanah I . Yogyakarta: Gadjah Mada University Prees.

Gaya MLA

Christady, Hardiyatmo, Hary. "Mekanika Tanah I". Yogyakarta: Gadjah Mada University Prees, 2012. Text.