A J Marshall & W D Williams. (1972). Textbook of Zoology Invertabrates (7.). Macmillian.
Chicago Edition CitationA J Marshall and W D Williams. Textbook of Zoology Invertabrates. 7. Macmillian, 1972.
MLA Edition CitationA J Marshall and W D Williams. Textbook of Zoology Invertabrates. 7. Macmillian, 1972.
Warning: These citations may not always be 100% accurate.