Wells, T. (1963). Three vertebrates: : a practical guide, 2nd ed (2nd ed.). Heinemann educational.
शिकागो स्टाइल उद्धरणWells, Tag. Three Vertebrates: : A Practical Guide, 2nd Ed. 2nd ed. London: Heinemann educational, 1963.
एमएलए उद्धरणWells, Tag. Three Vertebrates: : A Practical Guide, 2nd Ed. 2nd ed. Heinemann educational, 1963.
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