Berreman, Gerald D.
Ras, caste and other invidious distinction social stratification
Centre for Strategic and International Studies, [1972]
 Buku Teks
Nadel, S.F. (Siegfried Frederick)
The foundations of social anthropology
Cohen & West, 1969
 Buku Teks
Nadel, S.F. (Siegfried Frederick)
The foundations of social anthropology
The Free Press of Glencoe, 1964
 Buku Teks
Social foundations of education
Allyn and Bacon, 1991
 Buku Teks
Nadel, S.F. (Siegfried Frederick)
Foundations of social anthropology
Cohen & West, 1969
 Buku Teks