Langan John. (2003). Ten Skills You Really Need to Succeed in College. American: MC Graw Hill.
Dyfyniad Arddull ChicagoLangan John. Ten Skills You Really Need to Succeed in College. American: MC Graw Hill, 2003.
Dyfyniad MLALangan John. Ten Skills You Really Need to Succeed in College. American: MC Graw Hill, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.