APA (7th ed.) Citation

Crawford, W. (1979). The Keepers of light: A history & working guide to early photographic processes. Morgan & Morgan.

Chicago Style (17th ed.) Citation

Crawford, William. The Keepers of Light: A History & Working Guide to Early Photographic Processes. Dobbs Ferry, NY: Morgan & Morgan, 1979.

MLA (9th ed.) Citation

Crawford, William. The Keepers of Light: A History & Working Guide to Early Photographic Processes. Morgan & Morgan, 1979.