APA (7th ed.) Citation

Ray, W., & Ray, M. (1974). The art of invention: Patent models and their makers. Pyne Press.

Chicago Style (17th ed.) Citation

Ray, William, and Marlys Ray. The Art of Invention: Patent Models and Their Makers. Princeton: Pyne Press, 1974.

MLA (9th ed.) Citation

Ray, William, and Marlys Ray. The Art of Invention: Patent Models and Their Makers. Pyne Press, 1974.