Gaya APA

Hardiyatmo, H, C., Chitrakar, P, L. (s.a.,2018,2019). Mekanika Tanah I (Ed. 2,Ed. 7). Jakarta; Gramedia: -.

Gaya MLA

Hardiyatmo, Hary, Christady., Chitrakar, Prem, Lal. "Mekanika Tanah I". Ed. 2,Ed. 7 Jakarta; Gramedia: -, s.a.,2018,2019. Text.