(2005). Extra-curricular activities bad for learning. Manila Bulletin.
Dyfyniad Arddull Chicago"Extra-curricular Activities Bad for Learning." Manila Bulletin 2005.
Dyfyniad MLA"Extra-curricular Activities Bad for Learning." Manila Bulletin, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.