Silalahi และผู้แต่งคนอื่นๆ. 1999. Assessment of community health volunteers in dental care activities in Paktongchai district Nakornrajchasima Thailand. Faculty of Graduate Studies, Mahidol University;
Silalahi และผู้แต่งคนอื่นๆ. (1999) Assessment of community health volunteers in dental care activities in Paktongchai district Nakornrajchasima Thailand . Mahidol University/Bangkok.
Silalahi และผู้แต่งคนอื่นๆ. Assessment of community health volunteers in dental care activities in Paktongchai district Nakornrajchasima Thailand. . Bangkok:Mahidol University, 1999.
Silalahi และผู้แต่งคนอื่นๆ. (1999) Assessment of community health volunteers in dental care activities in Paktongchai district Nakornrajchasima Thailand . Mahidol University/Bangkok.