(1960). American standard safety code for elevators, dumbwaiters and escalators: Covering their design, construction, installation, operation, inspection, testing, maintenance, alteration and repair. New York: The American Society of Mechanical Engineers.
Παραπομπή Chicago StyleAmerican Standard Safety Code for Elevators, Dumbwaiters and Escalators: Covering Their Design, Construction, Installation, Operation, Inspection, Testing, Maintenance, Alteration and Repair. New York: The American Society of Mechanical Engineers, 1960.
Παραπομπή MLAAmerican Standard Safety Code for Elevators, Dumbwaiters and Escalators: Covering Their Design, Construction, Installation, Operation, Inspection, Testing, Maintenance, Alteration and Repair. New York: The American Society of Mechanical Engineers, 1960.