{{sfn|Youth|1973|p=}} * {{cite book | last=Youth | first=United States. President's Science Advisory Committee. Panel on | title=Youth: Transition to Adulthood | publisher=Univ. of Chicago Press | publication-place=Chicago | date=1973 | isbn=978-0-226-11341-8}}

<ref name="r196">{{cite book | last=Youth | first=United States. President's Science Advisory Committee. Panel on | title=Youth: Transition to Adulthood | publisher=Univ. of Chicago Press | publication-place=Chicago | date=1973 | isbn=978-0-226-11341-8 | page=}}</ref>