APA (7th ed.) Citation

State Historical Society of Wisconsin & Hafstad, M. R. (1973). Guide to the McCormick collection of the State Historical Society of Wisconsin.

Chicago Style (17th ed.) Citation

State Historical Society of Wisconsin and Margaret R. Hafstad. Guide to the McCormick Collection of the State Historical Society of Wisconsin. Madison, 1973.

MLA (9th ed.) Citation

State Historical Society of Wisconsin and Margaret R. Hafstad. Guide to the McCormick Collection of the State Historical Society of Wisconsin. 1973.