Schaffert, R. M., Winkler, J. H., Vaaler, L. E., & Deubner, R. L. (1949). The ferric chloride etching of copper for photoengravings. Photo Engravers Research.
Citazione stile Chigago Style (17a edizione)Schaffert, Roland M., J. Homer Winkler, Luther E. Vaaler, e Russell L. Deubner. The Ferric Chloride Etching of Copper for Photoengravings. Columbus: Photo Engravers Research, 1949.
Citatione MLA (9a ed.)Schaffert, Roland M., et al. The Ferric Chloride Etching of Copper for Photoengravings. Photo Engravers Research, 1949.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.