Cornel University Press, 1993
Buku Teks
edited by Amal Kumar Mukhopadhyay
Council for Political Studies, 1974
Buku Teks
Sampson, Edward G., author
John Wiley & Sons, 1976
Buku Teks
Fowler, Peter J., author
Routledge, 1995
Buku Teks
Speiser, Werner, author
Methuen , 1960
Buku Teks