The secret of exposure /
edited by Frank R. Fraprie.

APA Citation

Fraprie, F. Roy. (1920). The secret of exposure. Twentieth thousand, rev. and enl. Boston: American Photographic Pub. Co..

MLA Citation

Fraprie, Frank Roy, 1874-. The Secret of Exposure. Twentieth thousand, rev. and enl. Boston: American Photographic Pub. Co., 1920.

Warning: These citations may not always be complete (especially for serials).