APA (7th ed.) Citation

Treadwell, T. K., & Darrah, W. C. Stereographers of the world. National Stereoscopic Association.

Chicago Style (17th ed.) Citation

Treadwell, T. K., and William C. Darrah. Stereographers of the World. [Columbus, Ohio]: National Stereoscopic Association.

MLA (9th ed.) Citation

Treadwell, T. K., and William C. Darrah. Stereographers of the World. National Stereoscopic Association.

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