Dyfyniad APA

United States. Office of Vocational Rehabilitation. Rehabilitation Service Series.

Dyfyniad Arddull Chicago

United States. Office of Vocational Rehabilitation. Rehabilitation Service Series.

Dyfyniad MLA

United States. Office of Vocational Rehabilitation. Rehabilitation Service Series.

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