APA (7th ed.) Citation

Nintendō Kabushiki Kaisha. (2012). New Super Mario Bros. U. [Nintendo?].

Chicago Style (17th ed.) Citation

Nintendō Kabushiki Kaisha. New Super Mario Bros. U. [United States?]: [Nintendo?], 2012.

MLA (9th ed.) Citation

Nintendō Kabushiki Kaisha. New Super Mario Bros. U. [Nintendo?], 2012.

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