Gaya APA

hardiyatmo, H, C. (2012). Mekanika Tanah 1,edisi keenam (keenam). Yogyakarta: UGMPress.

Gaya MLA

hardiyatmo, Hary, Christady. "Mekanika Tanah 1,edisi keenam". keenam Yogyakarta: UGMPress, 2012. Text.