Gernsheim, H., & Gernsheim, A. (1969). The history of photography: From the camera obscura to the beginning of the modern era, / by Helmut Gernsheim in collaboration with Alison Gernsheim (Revised and enlarged edition.). Thames & Hudson.
Chicago Style (17th ed.) CitationGernsheim, Helmut, and Alison Gernsheim. The History of Photography: From the Camera Obscura to the Beginning of the Modern Era, / by Helmut Gernsheim in Collaboration with Alison Gernsheim. Revised and enlarged edition. London: Thames & Hudson, 1969.
MLA (8th ed.) CitationGernsheim, Helmut, and Alison Gernsheim. The History of Photography: From the Camera Obscura to the Beginning of the Modern Era, / by Helmut Gernsheim in Collaboration with Alison Gernsheim. Revised and enlarged edition. Thames & Hudson, 1969.