Gomez IV และ Francis Wade Z. (1991) The association between motivation and performance of volunteer health workers in Khlong-Khlung district, Kamphaengpet province, Thailand. Mahidol University,:ม.ป.ท.Gomez IV และ Francis Wade Z. 1991. The association between motivation and performance of volunteer health workers in Khlong-Khlung district, Kamphaengpet province, Thailand. ม.ป.ท.:Mahidol University,;Gomez IV และ Francis Wade Z. The association between motivation and performance of volunteer health workers in Khlong-Khlung district, Kamphaengpet province, Thailand. ม.ป.ท.:Mahidol University, 1991. Print.