Parker, T. J., & Haswell, W. A. (1962). Textbook of Zoology (1st ed. 1962.). Macmillan Education UK : Imprint: Red Globe Press. https://doi.org/10.1007/978-1-349-00198-9

Parker, Thomas Jeffery, and William Aitcheson Haswell. Textbook of Zoology. 1st ed. 1962. London: Macmillan Education UK : Imprint: Red Globe Press, 1962. https://doi.org/10.1007/978-1-349-00198-9.

Parker, Thomas Jeffery, and William Aitcheson Haswell. Textbook of Zoology. 1st ed. 1962. Macmillan Education UK : Imprint: Red Globe Press, 1962. https://doi.org/10.1007/978-1-349-00198-9.