Gaya APA

Hardiyatmo, H, C. (2019). Mekanika Tanah 2 (ed. 6, cet. 2). : UGM Press.

Gaya MLA

Hardiyatmo, Hary, Christady. "Mekanika Tanah 2". ed. 6, cet. 2 : UGM Press, 2019. Text.