Dyfyniad APA

Williams, I., & Curley, D. (2002). Green light: Student book. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Williams, Ivor, và Dermot Curley. Green Light: Student Book. New York: McGraw-Hill, 2002.

Dyfyniad MLA

Williams, Ivor, và Dermot Curley. Green Light: Student Book. New York: McGraw-Hill, 2002.

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