APA (7th ed.) Citation

Gernsheim, H., & Gernsheim, A. (1969). The history of photography : from the camera obsura to the beginning of the modern era / by H. Gernsheim and A. Gernsheim: From the camera obsura to the beginning of the modern era (Rev. ed.). Thames and Hudson.

Chicago Style (17th ed.) Citation

Gernsheim, Helmut, and Alison Gernsheim. The History of Photography : From the Camera Obsura to the Beginning of the Modern Era / by H. Gernsheim and A. Gernsheim: From the Camera Obsura to the Beginning of the Modern Era. Rev. ed. Thames and Hudson, 1969.

MLA (9th ed.) Citation

Gernsheim, Helmut, and Alison Gernsheim. The History of Photography : From the Camera Obsura to the Beginning of the Modern Era / by H. Gernsheim and A. Gernsheim: From the Camera Obsura to the Beginning of the Modern Era. Rev. ed. Thames and Hudson, 1969.

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