S. Gerhardt
发表
S. Gerhardt,
2001
.
S. Gerhardt,
2004
.
S. Gerhardt,
2006
.
P. Rigby,
S. Gerhardt,
C. McDougall,
2015,
Child: care, health and development.
S. Gerhardt,
2016
.
S. Gerhardt,
2014
.