Frydenberg, Erica, author
Routledge, 2008
Buku Teks
edited by Anthony Waish, Kevin M. Beaver
Routledge, Taylor & Francis Group, 2009
Buku Teks
Friedman, Marilyn M., author
Prentice-Hall, 2003
Buku Teks
American Psychological Association, 2004
Buku Teks
edited by Else Oyen
Sage, 1992
Buku Teks