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Dyfyniad Arddull ChicagoNational Research Council (U.S.). Panel on the Evaluation of AIDS Interventions, Inc ebrary, Susan L. Coyle, Robert F. Boruch, and Charles F. Turner. Evaluating AIDS Prevention Programs. Expanded ed. Washington, D.C.: National Academy Press, 1991.
Dyfyniad MLANational Research Council (U.S.). Panel on the Evaluation of AIDS Interventions, et al. Evaluating AIDS Prevention Programs. Expanded ed. National Academy Press, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.