APA (7th ed.) Citation

Koenig, K. P. (1994). Gumoil photographic printing. Focal Press.

Chicago Style (17th ed.) Citation

Koenig, Karl P. Gumoil Photographic Printing. Boston: Focal Press, 1994.

MLA (9th ed.) Citation

Koenig, Karl P. Gumoil Photographic Printing. Focal Press, 1994.

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