Sotheby`s <New York>. (2001). The Covert & Gertrude Hegarty Collection of important antique toys: Friday, October 12, 2001 New York.
Chicago-Zitierstil (17. Ausg.)Sotheby`s <New York>. The Covert & Gertrude Hegarty Collection of Important Antique Toys: Friday, October 12, 2001 New York. New York, 2001.
MLA-Zitierstil (8. Ausg.)Sotheby`s <New York>. The Covert & Gertrude Hegarty Collection of Important Antique Toys: Friday, October 12, 2001 New York. 2001.
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