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2. Alperin E. &Batalova J.(2018). Vietnamese people in the United States. Migration Information Source.https://www.migrationpolicy.org/article/vietnameseimmigrants-united-states-5
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4. The Zarit Burden Interview
5. Criterion validity of the Center for Epidemiologic Studies Depression scale (CES‐D): Results from a community‐based sample of older subjects in the Netherlands;Berkman A. T. F.;Psychological Medicine,1997