APA (7th ed.) Citation
Gardner, I. C. (1941). A test of lens resolution for the photographer. U.S. Govt. Print. Off..
Chicago Style (17th ed.) Citation
Gardner, Irvine C. A Test of Lens Resolution for the Photographer. Washington: U.S. Govt. Print. Off., 1941.
MLA (9th ed.) Citation
Gardner, Irvine C. A Test of Lens Resolution for the Photographer. U.S. Govt. Print. Off., 1941.
Warning: These citations may not always be 100% accurate.