APA (7th ed.) Citation

HBO Home Entertainment (Firm), March of Time, Inc, & Van Voorhis, W. (1937). Finland's 20th birthday. Home Box Office.

Chicago Style (17th ed.) Citation

HBO Home Entertainment (Firm), Inc March of Time, and Westbrook Van Voorhis. Finland's 20th Birthday. New York, NY: Home Box Office, 1937.

MLA (9th ed.) Citation

HBO Home Entertainment (Firm), et al. Finland's 20th Birthday. Home Box Office, 1937.