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Yan และผู้แต่งคนอื่นๆ. (1997) Social support and quality of life of Chinese chromic obstructive pulmonary disease patients . Chiang Mai University/Chiang Mai.
Yan และผู้แต่งคนอื่นๆ. Social support and quality of life of Chinese chromic obstructive pulmonary disease patients. . Chiang Mai:Chiang Mai University, 1997.
Yan และผู้แต่งคนอื่นๆ. (1997) Social support and quality of life of Chinese chromic obstructive pulmonary disease patients . Chiang Mai University/Chiang Mai.