Dyfyniad APA

(1993). Headway Upper-immediate: (Student's book). Oxford: Oxford University Press.

Dyfyniad Arddull Chicago

Headway Upper-immediate: (Student's Book). Oxford: Oxford University Press, 1993.

Dyfyniad MLA

Headway Upper-immediate: (Student's Book). Oxford: Oxford University Press, 1993.

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