Gammon, J., Gould, D., Kelly, D., & Goldstone, L. (2001). Examining the validity of pressure ulcer risk assessment scales: Developing and using illustrated patient simulations to collect the data INFORMATION POINT: Visual Analogue Scale. Journal of Clinical Nursing, 10(5), pp. 697-706. doi:10.1046/j.1365-2702.2001.00525.x

Gammon, John, Dinah Gould, Daniel Kelly, and Len Goldstone. "Examining the Validity of Pressure Ulcer Risk Assessment Scales: Developing and Using Illustrated Patient Simulations to Collect the Data INFORMATION POINT: Visual Analogue Scale." Journal of Clinical Nursing 10, no. 5 (2001): 697-706.

Gammon, John, Dinah Gould, Daniel Kelly, and Len Goldstone. "Examining the Validity of Pressure Ulcer Risk Assessment Scales: Developing and Using Illustrated Patient Simulations to Collect the Data INFORMATION POINT: Visual Analogue Scale." Journal of Clinical Nursing 10.5 (2001): 697-706.