Hass, G. (1987). Curriculum planning: A new approach (2nd ed.). Allyn and Bacon.
Dyfyniad Arddull ChicagoHass, Glen. Curriculum Planning: A New Approach. 2nd ed. Boston: Allyn and Bacon, 1987.
Dyfyniad MLAHass, Glen. Curriculum Planning: A New Approach. 2nd ed. Allyn and Bacon, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.