^ Walsh, Tim (October 2005) (英語). Timeless Toys: Classic Toys and the Playmakers Who Created Them. Andrews McMeel Publishing. p. 138. ISBN 9780740755712
2012年10月12日閲覧。 ^ Tim Walsh (2005). Timeless Toys: Classic Toys and the Playmakers Who Created Them. Andrews McMeel Publishing. ISBN 0-7407-5571-4. https://books