Hardiyatmo, H. C., & Hardiyatmo, H. C. (2002). Mekanika Tanah 1 Hary Christady Hardiyatmo. Gadjah Mada University Press.
Lua i Stíl Chicago (17ú heag.)Hardiyatmo, Hary Christady, agus Hary Christady Hardiyatmo. Mekanika Tanah 1 Hary Christady Hardiyatmo. Gadjah Mada University Press, 2002.
Lua MLA (8ú heag.)Hardiyatmo, Hary Christady, agus Hary Christady Hardiyatmo. Mekanika Tanah 1 Hary Christady Hardiyatmo. Gadjah Mada University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.