Riley, R. Q. (1994). Alternative cars in the 21st century: A new personal transporation paradigm. Warrendale, PA: Society of Automotive Engineers.
Παραπομπή Chicago StyleRiley, Robert Q. Alternative Cars in the 21st Century: A New Personal Transporation Paradigm. Warrendale, PA: Society of Automotive Engineers, 1994.
Παραπομπή MLARiley, Robert Q. Alternative Cars in the 21st Century: A New Personal Transporation Paradigm. Warrendale, PA: Society of Automotive Engineers, 1994.
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