| title | ISBN-13 | year of publication |
|---|---|---|
| Understanding Piaget: An Introduction to Children's Cognitive Development | 978-0-06-013454-9 | 1980 |
| Understanding Piaget: An Introduction to Children's Cognitive Development | 978-0-06-013439-6 | 1971 |
| Your Baby's Mind and How It Grows | 978-0-06-090886-7 | 1981 |
| Your Baby's Mind and How it Grows: Piaget's Theory for Parents | 978-0-06-013461-7 | 1978 |
A. P. · A.S. · A. Spencer · M.A. · M P · M S. · M. Spencer · Mary A. · Mary Ann · Mary Ann P. · Mary Ann Spencer · Mary Spencer · S. P.