Laird, Charlton Grant, 1901-
A Fawcett Premier Book, 1966
Buku Teks
Laird, Charlton Grant, 1901-
Fawcett World Library, 1957
Buku Teks
Whatmough, Joshua
The New American Library, 1956
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Koester, Almut, author
Routledge, 2006
Buku Teks
Psychology Press , 1999
Buku Teks