Dyfyniad APA
Das , B. M., & Ramana, G. (2011). Principles of soil dynamics (2nd ed.). Cengage Learning.
Dyfyniad Arddull Chicago
Das , Braja M., and G.V Ramana. Principles of Soil Dynamics. 2nd ed. Delhi: Cengage Learning, 2011.
Dyfyniad MLA
Das , Braja M., and G.V Ramana. Principles of Soil Dynamics. 2nd ed. Cengage Learning, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.