Sasithorn Tamarak และผู้แต่งคนอื่นๆ. (1996) Alternative types of care and their impacts on the quality of the Thai elderly in the Bangkok Metropolitan Area. National Institute of Development Administration:ม.ป.ท.Sasithorn Tamarak และผู้แต่งคนอื่นๆ. 1996. Alternative types of care and their impacts on the quality of the Thai elderly in the Bangkok Metropolitan Area. ม.ป.ท.:National Institute of Development Administration;Sasithorn Tamarak และผู้แต่งคนอื่นๆ. Alternative types of care and their impacts on the quality of the Thai elderly in the Bangkok Metropolitan Area. ม.ป.ท.:National Institute of Development Administration, 1996. Print.