Duffy Gerald G. (1989). Improving classroom reading instruction (2nd ed.). Random House.
Dyfyniad Arddull ChicagoDuffy Gerald G. Improving Classroom Reading Instruction. 2nd ed. New York: Random House, 1989.
Dyfyniad MLADuffy Gerald G. Improving Classroom Reading Instruction. 2nd ed. Random House, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.