Dyfyniad APA

Liu, C., & Evett , J. B. (1997). Soil properties testing measurement and evaluation (3rd ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Liu, Cheng, and Jack B. Evett. Soil Properties Testing Measurement and Evaluation. 3rd ed. New Jerssey: Prentice Hall, 1997.

Dyfyniad MLA

Liu, Cheng, and Jack B. Evett. Soil Properties Testing Measurement and Evaluation. 3rd ed. Prentice Hall, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.