APA (7th ed.) Citation

Swing, R. E. An Introduction to Microdensitometry. SPIE Digital Library.

Chicago Style (17th ed.) Citation

Swing, Richard E. An Introduction to Microdensitometry. SPIE Digital Library.

MLA (8th ed.) Citation

Swing, Richard E. An Introduction to Microdensitometry. SPIE Digital Library.

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