Villers, Raymond, 1911-
Prentice-Hall, 1960
Buku Teks
Bendix, Reinhard, author
John Wiley & Sons, 1956
Buku Teks
Bendix, Reinhard, author
University of California Press, 1974
Buku Teks
George, Claude S.
Balai Lektur Mahasiswa, 1975
Buku Teks
Norcross, Harold, author
Pan Books, 1971
Buku Teks