APA (7th ed.) Citation

Não informado. (2011). Railway Signaling. Simmons Boardman Publishing.

Chicago Style (17th ed.) Citation

Não informado. Railway Signaling. Chicago, Ill: Simmons Boardman Publishing, 2011.

MLA (8th ed.) Citation

Não informado. Railway Signaling. Simmons Boardman Publishing, 2011.

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