APA (7th ed.) Citation

Calder, D., & Lee, J. (2011). An obstacle signaling system for the blind. IEEE.

Chicago Style (17th ed.) Citation

Calder, David, and Ju-Jang Lee. An Obstacle Signaling System for the Blind. IEEE, 2011.

MLA (9th ed.) Citation

Calder, David, and Ju-Jang Lee. An Obstacle Signaling System for the Blind. IEEE, 2011.

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