Easton, David
John Wiley & Sons, 1965
Buku Teks
Maor
Buku Teks
Eisenstadt, Shmuel Noah
Free Press, 1967
Buku Teks
edited by Michael Banton
Tavistock Publications, 1972
Buku Teks
editors, Robert E. Ward and Roy C. Macridis
Prentice-Hall, 1963
Buku Teks