Maneebongkot Chaumaroeng และ Alessio Panza. (2018) Prevalence and factors associated with safe sex behaviors among adolescent vocational students in Nakhon Ratchasima Province, Thailand. Chulalongkorn University:ม.ป.ท.Maneebongkot Chaumaroeng และ Alessio Panza. 2018. Prevalence and factors associated with safe sex behaviors among adolescent vocational students in Nakhon Ratchasima Province, Thailand. ม.ป.ท.:Chulalongkorn University;Maneebongkot Chaumaroeng และ Alessio Panza. Prevalence and factors associated with safe sex behaviors among adolescent vocational students in Nakhon Ratchasima Province, Thailand. ม.ป.ท.:Chulalongkorn University, 2018. Print.