Παραπομπή APA

Wells, T. (1963). Three vertebrates: : a practical guide, 2nd ed (2nd ed.). Heinemann educational.

Παραπομπή Chicago Style

Wells, Tag. Three Vertebrates: : A Practical Guide, 2nd Ed. 2nd ed. London: Heinemann educational, 1963.

Παραπομπή MLA

Wells, Tag. Three Vertebrates: : A Practical Guide, 2nd Ed. 2nd ed. Heinemann educational, 1963.