edited by James G. Snider and Charles E. Osgood
Aldine Publishing, 1977
Buku Teks
Menninger, Karl
Basic Books, 1963
Buku Teks
Allen, Stan, author
Routledge, 2009
Buku Teks
Bender, James F., author
McGraw-Hill, 1950
Buku Teks
Vance, Lawrence L., author
Henry Holt, 1959
Buku Teks