APA (7th ed.) Citation

HBO Home Entertainment (Firm), March of Time, Inc, & Van Voorhis, W. (1938). Threat to Gibraltar. Home Box Office.

Chicago Style (17th ed.) Citation

HBO Home Entertainment (Firm), Inc March of Time, and Westbrook Van Voorhis. Threat to Gibraltar. New York, NY: Home Box Office, 1938.

MLA (9th ed.) Citation

HBO Home Entertainment (Firm), et al. Threat to Gibraltar. Home Box Office, 1938.