APA (7th ed.) Citation

Marsh, J. Photonics Technology in the 21st Century. SPIE Digital Library.

Chicago Style (17th ed.) Citation

Marsh, John. Photonics Technology in the 21st Century. SPIE Digital Library.

MLA (9th ed.) Citation

Marsh, John. Photonics Technology in the 21st Century. SPIE Digital Library.

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