Tidwell และผู้แต่งคนอื่นๆ. 1989. A focus group study of delivery practices of traditional birth attendants in a Karen refugee camp. Faculty of Graduate Studies, Mahidol University;
Tidwell และผู้แต่งคนอื่นๆ. (1989) A focus group study of delivery practices of traditional birth attendants in a Karen refugee camp . Mahidol University/Bangkok.
Tidwell และผู้แต่งคนอื่นๆ. A focus group study of delivery practices of traditional birth attendants in a Karen refugee camp. . Bangkok:Mahidol University, 1989.
Tidwell และผู้แต่งคนอื่นๆ. (1989) A focus group study of delivery practices of traditional birth attendants in a Karen refugee camp . Mahidol University/Bangkok.