Toys and Children: Aggressive toys and play. National Toy Council.
Chicago-Zitierstil (17. Ausg.)Toys and Children: Aggressive Toys and Play. London: National Toy Council.
MLA-Zitierstil (8. Ausg.)Toys and Children: Aggressive Toys and Play. National Toy Council.
警告：這些引文格式不一定是100％准確.