APA (7th ed.) Citation

RAY. (1977). The Lens and all its jobs. Focal Press.

Chicago Style (17th ed.) Citation

RAY. The Lens and All Its Jobs. London: Focal Press, 1977.

MLA (8th ed.) Citation

RAY. The Lens and All Its Jobs. Focal Press, 1977.

Warning: These citations may not always be 100% accurate.