editor, Karl A. Gschneidner, LeRoy LeRoy
North-Holland, 1982
Buku Referensi
Roberta Carroll
Jossey- Bass, 2011
Buku Teks
Gower, 1990
Buku Referensi
William Damon, editor-in-chief
John Wiley & Sons, 1998
Buku Referensi
edited by S. Marchant, P.J. Higgins
Oxford University Press, 1993
Buku Referensi