Friedmann, Wolfgang, 1907-1972, author
Penguin Books, 1972
Buku Teks
Hall, Jerome, author
Louisiana State University Press, 1963
Buku Klasik
Carlston, Kenneth S., author
Columbia University Press, 1956
Buku Teks
Sudargo Gautama, author
Alumni, 1972
Buku Teks
Samford, Charles J.G., author
Basil Blackwell, 1989
Buku Teks