APA (7th ed.) Citation

Petzold, P. (1976). The focalguide to low light photography. Focal Press.

Chicago Style (17th ed.) Citation

Petzold, Paul. The Focalguide to Low Light Photography. London: Focal Press, 1976.

MLA (9th ed.) Citation

Petzold, Paul. The Focalguide to Low Light Photography. Focal Press, 1976.

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