Vacca, R. T., & Vacca, J. A. L. (1989). Content area reading (3rd ed.). Scott, Foresman.
Dyfyniad Arddull ChicagoVacca, Richard T., and Jo Anne L. Vacca. Content Area Reading. 3rd ed. Glenview, Ill: Scott, Foresman, 1989.
Dyfyniad MLAVacca, Richard T., and Jo Anne L. Vacca. Content Area Reading. 3rd ed. Scott, Foresman, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.