Cita APA

American National Standards Institute, & American National Standards Institute. (1972). Graphic symbols for railroad maps and profiles. New York, New York: American Society of Mechanical Engineers.

Citación estilo Chicago

American National Standards Institute, y American National Standards Institute. Graphic Symbols for Railroad Maps and Profiles. New York, New York: American Society of Mechanical Engineers, 1972.

Cita MLA

American National Standards Institute, y American National Standards Institute. Graphic Symbols for Railroad Maps and Profiles. New York, New York: American Society of Mechanical Engineers, 1972.