APA (7th ed.) Citation

Isayama, H., & Title. (2020). Attack on Titan: Vol. 31. Kondansha Comics.

Chicago Style (17th ed.) Citation

Isayama, Hajime, and Title. Attack on Titan: Vol. 31. New York: Kondansha Comics, 2020.

MLA (9th ed.) Citation

Isayama, Hajime, and Title. Attack on Titan: Vol. 31. Kondansha Comics, 2020.