APA (7th ed.) Citation

Files, V. Optical Hard Copy and Printing Systems. SPIE Digital Library.

Chicago Style (17th ed.) Citation

Files, Victor. Optical Hard Copy and Printing Systems. SPIE Digital Library.

MLA (9th ed.) Citation

Files, Victor. Optical Hard Copy and Printing Systems. SPIE Digital Library.

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