Dyfyniad APA
(2013). Properties of concrete (5th ed.). Pearson Education Limited.
Dyfyniad Arddull Chicago
Properties of Concrete. 5th ed. India: Pearson Education Limited, 2013.
Dyfyniad MLA
Properties of Concrete. 5th ed. Pearson Education Limited, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.