Agustawijaya, D. S. (2007). The Uniaxial Compressive Strength of Soft Rock. Petra Christian University.
Chicago-čujuhus (17. p.)Agustawijaya, D. S. The Uniaxial Compressive Strength of Soft Rock. Petra Christian University, 2007.
MLA-čujuhus (9. p.)Agustawijaya, D. S. The Uniaxial Compressive Strength of Soft Rock. Petra Christian University, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.