Backman, Louise
Almqvist and Wiksell International, 1978
Buku Teks
Hultkrantz, Ake
The Humanistic Foundation of Sweden, 1953
Buku Teks
Russell, Louise B.
The Brookings Institute, 1979
Buku Teks
Kim, Tae-kon
Buku Teks
Ake, Claude
The Dorsey Press, 1967
Buku Teks