APA (7th ed.) Citation

Oregon Historical Records Survey & Angelus Studio. (1940). A guide to the Angelus Studio collection of historic photographs.

Chicago Style (17th ed.) Citation

Oregon Historical Records Survey and Angelus Studio. A Guide to the Angelus Studio Collection of Historic Photographs. Portland, 1940.

MLA (8th ed.) Citation

Oregon Historical Records Survey and Angelus Studio. A Guide to the Angelus Studio Collection of Historic Photographs. 1940.

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