1951
Buku Teks
Adams, Walter, 1922-1998, author
Prentice-Hall, 2001
Buku Teks
Weiss, Leonard W., author
John Wiley & Sons, 1980
Buku Teks
Northwestern University Press, 1967
Buku Teks
Florence, P. Sargant, author
Routledge & Kegan Paul, 1957
Buku Teks