Dyfyniad APA

Bishop Sue. (1999). Assertiveness Skills Training. Viva Books.

Dyfyniad Arddull Chicago

Bishop Sue. Assertiveness Skills Training. New Delhi: Viva Books, 1999.

Dyfyniad MLA

Bishop Sue. Assertiveness Skills Training. Viva Books, 1999.

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