Dyfyniad APA

Gillen, T. (1995). Assertiveness. Universities Press.

Dyfyniad Arddull Chicago

Gillen, Terry. Assertiveness. Hyderabad: Universities Press, 1995.

Dyfyniad MLA

Gillen, Terry. Assertiveness. Universities Press, 1995.

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