APA (7th ed.) Citation

HBO Home Entertainment (Firm) & March of Time, Inc. (1940). Watch o'er the ramparts. Home Box Office.

Chicago Style (17th ed.) Citation

HBO Home Entertainment (Firm) and Inc March of Time. Watch O'er the Ramparts. New York, NY: Home Box Office, 1940.

MLA (9th ed.) Citation

HBO Home Entertainment (Firm) and Inc March of Time. Watch O'er the Ramparts. Home Box Office, 1940.