Long, M. T. (1985). Protective helmets for infants and children on bicycles.
シカゴスタイル引用形Long, M T. Protective Helmets for Infants and Children On Bicycles. 1985.
MLA引用形式Long, M T. Protective Helmets for Infants and Children On Bicycles. 1985.
警告: この引用は必ずしも正確ではありません.