APA (7th ed.) Citation

Webb, H. A., & Ashwell, D. G. (1967). A mathematical tool-kit for engineers (3rd ed.). Longmans.

Chicago Style (17th ed.) Citation

Webb, H. A., and D. G. Ashwell. A Mathematical Tool-kit for Engineers. 3rd ed. London: Longmans, 1967.

MLA (9th ed.) Citation

Webb, H. A., and D. G. Ashwell. A Mathematical Tool-kit for Engineers. 3rd ed. Longmans, 1967.