Langan, J. (1998). Reading and study skills (6th ed.). McGraw-Hill Higher Education.
Dyfyniad Arddull ChicagoLangan, John. Reading and Study Skills. 6th ed. New York, NY : Bostom: McGraw-Hill Higher Education, 1998.
Dyfyniad MLALangan, John. Reading and Study Skills. 6th ed. McGraw-Hill Higher Education, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.