Häfner, M. (2001). The German Toy Museum. German News.
Chicago-Zitierstil (17. Ausg.)Häfner, Michael. "The German Toy Museum." German News 2001.
MLA-Zitierstil (8. Ausg.)Häfner, Michael. "The German Toy Museum." German News, 2001.
警告：這些引文格式不一定是100％准確.