Dyfyniad APA

Wainwright, G. (1999). Tricky business letters. Universities Press.

Dyfyniad Arddull Chicago

Wainwright, Gordon. Tricky Business Letters. Hyderabad: Universities Press, 1999.

Dyfyniad MLA

Wainwright, Gordon. Tricky Business Letters. Universities Press, 1999.

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