Dyfyniad APA

Frost, J. L., Wortham, S. C., & Reifel, R. S. (2012). Play and child development (4th ed.). Pearson.

Dyfyniad Arddull Chicago

Frost, Joe L., Sue Clark Wortham, and Robert Stuart Reifel. Play and Child Development. 4th ed. Boston: Pearson, 2012.

Dyfyniad MLA

Frost, Joe L., et al. Play and Child Development. 4th ed. Pearson, 2012.

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