Não informado. (2011). Railway Signaling. Simmons Boardman Publishing.
Style de citation Chicago (17e éd.)Não informado. Railway Signaling. Chicago, Ill: Simmons Boardman Publishing, 2011.
Style de citation MLA (8e éd.)Não informado. Railway Signaling. Simmons Boardman Publishing, 2011.
Attention : ces citations peuvent ne pas être correctes à 100%.