APA (7th ed.) Citation

Whedon, J., Harris, N. P., Fillion, N., Day, F., & Mutant Enemy Inc. (2008). Dr. Horrible's sing-along blog. Mutant Enemy.

Chicago Style (17th ed.) Citation

Whedon, Joss, Neil Patrick Harris, Nathan Fillion, Felicia Day, and Mutant Enemy Inc. Dr. Horrible's Sing-along Blog. [Los Angeles]: Mutant Enemy, 2008.

MLA (8th ed.) Citation

Whedon, Joss, et al. Dr. Horrible's Sing-along Blog. Mutant Enemy, 2008.