APA (7th ed.) Citation

Wurm, S. A., Hattori, S., & Baumann, T. (1981). Japanese dialects ([Proof?].). Japan Academy.

Chicago Style (17th ed.) Citation

Wurm, S. A., Shirō Hattori, and Theo Baumann. Japanese Dialects. [Proof?]. [Tokyo?]: Japan Academy, 1981.

MLA (9th ed.) Citation

Wurm, S. A., et al. Japanese Dialects. [Proof?]. Japan Academy, 1981.