APA (7th ed.) Citation

Todd, D. J. (1985). Walking machines: An introduction to legged robots. [publisher not identified].

Chicago Style (17th ed.) Citation

Todd, D. J. Walking Machines: An Introduction to Legged Robots. New York : Chapman and Hall: [publisher not identified], 1985.

MLA (9th ed.) Citation

Todd, D. J. Walking Machines: An Introduction to Legged Robots. [publisher not identified], 1985.