Gaya APA

Fredlund, D, G., Rahardjo, H. (1993). Soil Mechanics for Unsaturated Soils . United States of America: John Wiley & Sons Ltd..

Gaya MLA

Fredlund, D., G.., Rahardjo, H.. "Soil Mechanics for Unsaturated Soils". United States of America: John Wiley & Sons Ltd., 1993. Text.