Columbia subject headings:
Developmental psychology--Cross-cultural studies.
Teenage boys--Italy--Longitudinal studies.
Teenage boys--United States--Longitudinal studies.
Harvard subject headings:
Developmental psychology--Cross-cultural studies
Teenage boys--Italy--Longitudinal studies.
Teenage boys--United States--Longitudinal studies.
Princeton subject headings:
Developmental psychology--Cross-cultural studies.
Teenage boys--Italy--Longitudinal studies.
Teenage boys--United States--Longitudinal studies.