Liu และผู้แต่งคนอื่นๆ. 1999. Severity of illness and self-care behavior among asthmatic patients. Field of Study Medical and Surgical Nursing, Chiang Mai University;
Liu และผู้แต่งคนอื่นๆ. (1999) Severity of illness and self-care behavior among asthmatic patients . Chiang Mai University/Chiang Mai.
Liu และผู้แต่งคนอื่นๆ. Severity of illness and self-care behavior among asthmatic patients. . Chiang Mai:Chiang Mai University, 1999.
Liu และผู้แต่งคนอื่นๆ. (1999) Severity of illness and self-care behavior among asthmatic patients . Chiang Mai University/Chiang Mai.