APA (7th ed.) Citation

Betensky, E. Zoom Lenses II. SPIE Digital Library.

Chicago Style (17th ed.) Citation

Betensky, Ellis. Zoom Lenses II. SPIE Digital Library.

MLA (8th ed.) Citation

Betensky, Ellis. Zoom Lenses II. SPIE Digital Library.

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