Retter, H. (1999). Postmodernity - What about Toys?: Symposium "postmodernity", 2. International Toy Research Conference, Halmstad University, Sweden, June 14-19 1999.
Chicago-Zitierstil (17. Ausg.)Retter, Hein. Postmodernity - What About Toys?: Symposium "Postmodernity", 2. International Toy Research Conference, Halmstad University, Sweden, June 14-19 1999. Braunschweig?, 1999.
MLA-Zitierstil (8. Ausg.)Retter, Hein. Postmodernity - What About Toys?: Symposium "Postmodernity", 2. International Toy Research Conference, Halmstad University, Sweden, June 14-19 1999. 1999.
警告：這些引文格式不一定是100％准確.