APA (7th ed.) Citation

Schaffert, R. M., Winkler, J. H., Vaaler, L. E., & Deubner, R. L. (1949). The ferric chloride etching of copper for photoengravings. Photo Engravers Research.

Chicago Style (17th ed.) Citation

Schaffert, Roland M., J. Homer Winkler, Luther E. Vaaler, and Russell L. Deubner. The Ferric Chloride Etching of Copper for Photoengravings. Columbus: Photo Engravers Research, 1949.

MLA (9th ed.) Citation

Schaffert, Roland M., et al. The Ferric Chloride Etching of Copper for Photoengravings. Photo Engravers Research, 1949.