APA (7th ed.) Citation

(1989). The source of today's thirty-five millimeter photography: The contribution made by the Leica-camera to the early development of thirty-five millimeter photography / by Emil G. Keller.

Chicago Style (17th ed.) Citation

The Source of Today's Thirty-five Millimeter Photography: The Contribution Made by the Leica-camera to the Early Development of Thirty-five Millimeter Photography / by Emil G. Keller. 1989.

MLA (9th ed.) Citation

The Source of Today's Thirty-five Millimeter Photography: The Contribution Made by the Leica-camera to the Early Development of Thirty-five Millimeter Photography / by Emil G. Keller. 1989.