Curtis, H., & Barnes, N. S. (1999). Biología (5a. ed.). Editorial Médica Panamericana.
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Dyfyniad Arddull Chicago
Curtis, Helena, and N. Sue Barnes. Biología. 5a. ed. Madrid: Editorial Médica Panamericana, 1999.
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Dyfyniad MLA
Curtis, Helena, and N. Sue Barnes. Biología. 5a. ed. Editorial Médica Panamericana, 1999.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.