Mwangala และ Perry. (2000) Risky sexual behavior and HIV infection in Zambia : a multivariate analysis of socio-demographic predictors. Mahidol University,:ม.ป.ท.Mwangala และ Perry. 2000. Risky sexual behavior and HIV infection in Zambia : a multivariate analysis of socio-demographic predictors. ม.ป.ท.:Mahidol University,;Mwangala และ Perry. Risky sexual behavior and HIV infection in Zambia : a multivariate analysis of socio-demographic predictors. ม.ป.ท.:Mahidol University, 2000. Print.