APA (7th ed.) Citation

Alderfer, H. F., & Sigmond, R. M. (1941). Presidential elections by Pennsylvania counties, 1920-1940. The Pennsylvania State College.

Chicago Style (17th ed.) Citation

Alderfer, Harold Freed, and Robert M. Sigmond. Presidential Elections by Pennsylvania Counties, 1920-1940. State college, Pa.: The Pennsylvania State College, 1941.

MLA (9th ed.) Citation

Alderfer, Harold Freed, and Robert M. Sigmond. Presidential Elections by Pennsylvania Counties, 1920-1940. The Pennsylvania State College, 1941.