Dyfyniad APA

(2006). Downtown: English for work and life. Boston, MA: Thomson/Heinl.

Dyfyniad Arddull Chicago

Downtown: English for Work and Life. Boston, MA: Thomson/Heinl, 2006.

Dyfyniad MLA

Downtown: English for Work and Life. Boston, MA: Thomson/Heinl, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.