APA (7th ed.) Citation

Isayama, H., & Title. (2017). Attack on Titan: Vol. 23. Kondansha Comics.

Chicago Style (17th ed.) Citation

Isayama, Hajime, and Title. Attack on Titan: Vol. 23. New York: Kondansha Comics, 2017.

MLA (9th ed.) Citation

Isayama, Hajime, and Title. Attack on Titan: Vol. 23. Kondansha Comics, 2017.

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