APA (7th ed.) Citation

Universal Pictures (Firm), Marx, H., Marx, G., & Marx, W. (2004). Bonus materials: Inside the NBC vault : Today show interviews with Harpo Marx (1961), Groucho Marx (1963), William Marx (1985). Universal.

Chicago Style (17th ed.) Citation

Universal Pictures (Firm), Harpo Marx, Groucho Marx, and William Marx. Bonus Materials: Inside the NBC Vault : Today Show Interviews with Harpo Marx (1961), Groucho Marx (1963), William Marx (1985). Universal City, CA: Universal, 2004.

MLA (9th ed.) Citation

Universal Pictures (Firm), et al. Bonus Materials: Inside the NBC Vault : Today Show Interviews with Harpo Marx (1961), Groucho Marx (1963), William Marx (1985). Universal, 2004.