Roper, N., Logan, W. W., & Tierney, A. J. (1990). The elements of nursing: A model for nursing based on a model of living (3rd edition.). Churchill Livingstone.
Παραπομπή σε μορφή Chicago (17η εκδ.)Roper, Nancy, Winifred W. Logan, και Alison J. Tierney. The Elements of Nursing: A Model for Nursing Based on a Model of Living. 3rd edition. Edinburgh: Churchill Livingstone, 1990.
Παραπομπή σε μορφή MLA (8th εκδ.)Roper, Nancy, et al. The Elements of Nursing: A Model for Nursing Based on a Model of Living. 3rd edition. Churchill Livingstone, 1990.
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