BRAC. (1988). The research and evaluation division: Annual report.
Dyfyniad Arddull ChicagoBRAC. The Research and Evaluation Division: Annual Report. 1988.
Dyfyniad MLABRAC. The Research and Evaluation Division: Annual Report. 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.