Cita APA (7a ed.)
Brignano, M., & McCullough, M. The Search for Safety: A History of Railroad Signals and the People Who Made Them. American Standard.
Cita estilo Chicago (17a ed.)
Brignano, Mary, y Max McCullough. The Search for Safety: A History of Railroad Signals and the People Who Made Them. Pittsburgh, EUA: American Standard.
Cita MLA (9a ed.)
Brignano, Mary, y Max McCullough. The Search for Safety: A History of Railroad Signals and the People Who Made Them. American Standard.
警告：這些引文格式不一定是100％准確.