Dyfyniad APA

Rowland, V., & Birkett, K. (1992). Personal effectiveness for teachers. Simon and Schuster.

Dyfyniad Arddull Chicago

Rowland, Val, and Ken Birkett. Personal Effectiveness for Teachers. Hertfordshire: Simon and Schuster, 1992.

Dyfyniad MLA

Rowland, Val, and Ken Birkett. Personal Effectiveness for Teachers. Simon and Schuster, 1992.

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