Viroj Lengrugsa. 2002. Appropriate guideline for people participation in the promotion of primary health care case study : Amphoe Pak Chong. Field of Study Appropriate Technology for Resource Development, Mahidol University;
Viroj Lengrugsa. (2002) Appropriate guideline for people participation in the promotion of primary health care case study : Amphoe Pak Chong . Mahidol University/Bangkok.
Viroj Lengrugsa. Appropriate guideline for people participation in the promotion of primary health care case study : Amphoe Pak Chong. . Bangkok:Mahidol University, 2002.
Viroj Lengrugsa. (2002) Appropriate guideline for people participation in the promotion of primary health care case study : Amphoe Pak Chong . Mahidol University/Bangkok.