-
1ā- Erikson, Erik H. (Erik Homburger), 1902-1994Ngā marau “...Developmental psychology....”
I whakaputaina 1977
Pukapuka -
2I whakaputaina 2008Ngā marau “...Play Psychological aspects....”
Pukapuka -
3ā- Levin, Diane E.Ngā marau “...Toys United States Psychological aspects....”
I whakaputaina 2006
Pukapuka