Dyfyniad APA

Peterson, S., & Peterson, J. (2002). Working with clay (2nd ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Peterson, Susan, and Jan Peterson. Working with Clay. 2nd ed. New Jersey: Prentice Hall, 2002.

Dyfyniad MLA

Peterson, Susan, and Jan Peterson. Working with Clay. 2nd ed. Prentice Hall, 2002.

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