APA (7th ed.) Citation

Railway signaling. [Simmons Boardman Pub. Corp.].

Chicago Style (17th ed.) Citation

Railway Signaling. [Chicago]: [Simmons Boardman Pub. Corp.].

MLA (8th ed.) Citation

Railway Signaling. [Simmons Boardman Pub. Corp.].

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