Não informado. (1970). Journal of Traffic Safety Education. California Driver Education Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Traffic Safety Education. Long Beach, Calif: California Driver Education Association, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Traffic Safety Education. California Driver Education Association, 1970.
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