International Council for Children's Play (ICCP). International Council for Children's Play (ICCP). Zentralsekretariat.
Chicago-Zitierstil (17. Ausg.)International Council for Children's Play (ICCP). International Council for Children's Play (ICCP). Ulm: Zentralsekretariat.
MLA-Zitierstil (8. Ausg.)International Council for Children's Play (ICCP). International Council for Children's Play (ICCP). Zentralsekretariat.
警告：這些引文格式不一定是100％准確.