Geltsen และ Tseten. (1993) Sexual behavior of male construction laborers towards knowledge and perception of HIV infection and AIDS, in Bangkok. Mahidol University,:ม.ป.ท.Geltsen และ Tseten. 1993. Sexual behavior of male construction laborers towards knowledge and perception of HIV infection and AIDS, in Bangkok. ม.ป.ท.:Mahidol University,;Geltsen และ Tseten. Sexual behavior of male construction laborers towards knowledge and perception of HIV infection and AIDS, in Bangkok. ม.ป.ท.:Mahidol University, 1993. Print.