APA (7th ed.) Citation

ProQuest (Firm). (1940). Key to the year of decision of any case in the United States Supreme Court Federal and State reports. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). Key to the Year of Decision of Any Case in the United States Supreme Court Federal and State Reports. Washington: [publisher not identified], 1940.

MLA (9th ed.) Citation

ProQuest (Firm). Key to the Year of Decision of Any Case in the United States Supreme Court Federal and State Reports. [publisher not identified], 1940.