Umpava Timpan. 2005. Sexuality of male adolescents : a case study of urban male adolescents at risk to sexual behavior in Chiang Mai province. Field of Study Medical and Health Social Science, Mahidol University;
Umpava Timpan. (2005) Sexuality of male adolescents : a case study of urban male adolescents at risk to sexual behavior in Chiang Mai province . Mahidol University/Bangkok.
Umpava Timpan. Sexuality of male adolescents : a case study of urban male adolescents at risk to sexual behavior in Chiang Mai province. . Bangkok:Mahidol University, 2005.
Umpava Timpan. (2005) Sexuality of male adolescents : a case study of urban male adolescents at risk to sexual behavior in Chiang Mai province . Mahidol University/Bangkok.