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, N.Y.: Morgan & Morgan, 1979.

MLA (8th ed.) Citation

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