McMullan, M., Endacott, R., Gray, M. A., Jasper, M., Miller, C. M., Scholes, J., & Webb, C. (2003). Portfolios and assessment of competence: a review of the literature. Journal of Advanced Nursing, 41(3), 283-294. https://doi.org/10.1046/j.1365-2648.2003.02528.x