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Dyfyniad MLARper, Nancy, and Penerjemah: Andri Harton. Prinsip,Prinsip Keperawatan. Yogyakarta: Andi Yayasan Essentia Medica, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.