Yam, C. H., Liu, S., Huang, O. H., Yeoh, E., & Griffiths, S. M. (2011). Can vouchers make a difference to the use of private primary care services by older people? Experience from the healthcare reform programme in Hong Kong. BioMed Central.

Yam, Carrie HK, Su Liu, Olivia HY Huang, EK Yeoh, e Sian M. Griffiths. Can Vouchers Make a Difference to the Use of Private Primary Care Services By Older People? Experience From the Healthcare Reform Programme In Hong Kong. BioMed Central, 2011.

Yam, Carrie HK, et al. Can Vouchers Make a Difference to the Use of Private Primary Care Services By Older People? Experience From the Healthcare Reform Programme In Hong Kong. BioMed Central, 2011.