Não informado. (1970). Journal of Traffic Safety Education. California Driver Education Association.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Traffic Safety Education. Long Beach, Calif: California Driver Education Association, 1970.
Citação MLA (8ª ed.)Não informado. Journal of Traffic Safety Education. California Driver Education Association, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.