APA (7th ed.) Citation

Marshall, A. J., & Williams, W. D. (1972). Textbook of Zoology: Invertebrates (7th ed.). Macmillan.

Chicago Style (17th ed.) Citation

Marshall, A. J., and W. D. Williams. Textbook of Zoology: Invertebrates. 7th ed. London: Macmillan, 1972.

MLA (9th ed.) Citation

Marshall, A. J., and W. D. Williams. Textbook of Zoology: Invertebrates. 7th ed. Macmillan, 1972.