APA (7th ed.) Citation

British Iron and Steel Federation, British Steel Producers' Conference, & Gray, C. S. (1966). Steel designers' manual (3rd ed.). Lockwood.

Chicago Style (17th ed.) Citation

British Iron and Steel Federation, British Steel Producers' Conference, and Charles S. Gray. Steel Designers' Manual. 3rd ed. London: Lockwood, 1966.

MLA (8th ed.) Citation

British Iron and Steel Federation, et al. Steel Designers' Manual. 3rd ed. Lockwood, 1966.