APA (7th ed.) Citation

Ray, S. F. (1979). The photographic lens. Focal.

Chicago Style (17th ed.) Citation

Ray, Sidney F. The Photographic Lens. London: Focal, 1979.

MLA (9th ed.) Citation

Ray, Sidney F. The Photographic Lens. Focal, 1979.

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