APA (7th ed.) Citation

Kawahara, R., Adachi, S., Tanaka, M., Matsuoka, Y., Taketatsu, A., Tohmatsu, H., . . . Seitz, P. (2017). Sword art online: Extra edition. Aniplex of America, Inc..

Chicago Style (17th ed.) Citation

Kawahara, Reki, et al. Sword Art Online: Extra Edition. [Santa Monica, California]: Aniplex of America, Inc., 2017.

MLA (9th ed.) Citation

Kawahara, Reki, et al. Sword Art Online: Extra Edition. Aniplex of America, Inc., 2017.