APA (7th ed.) Citation

Blizzard Entertainment (Firm). (2009). BlizzCon, Anaheim 2009. Blizzard Entertainment.

Chicago Style (17th ed.) Citation

Blizzard Entertainment (Firm). BlizzCon, Anaheim 2009. [California?]: Blizzard Entertainment, 2009.

MLA (9th ed.) Citation

Blizzard Entertainment (Firm). BlizzCon, Anaheim 2009. Blizzard Entertainment, 2009.

Warning: These citations may not always be 100% accurate.