Pamela Wallin. (2001). Speaking of success. Canada: Key Porter Books.
Dyfyniad Arddull ChicagoPamela Wallin. Speaking of Success. Canada: Key Porter Books, 2001.
Dyfyniad MLAPamela Wallin. Speaking of Success. Canada: Key Porter Books, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.