edited by John Ravenhill
NY Oxford University Press, 2017
Buku Teks
Bagchi, Amiya Kumar, author
Cambridge University Press , 1984
Buku Teks
Balaam, David N., 1950-, author
Pearson Education, 2014
Buku Teks
Balaam, David N., 1950-, author
Pearson/Prentice Hall, 2005
Buku Teks
Balaam, David N., 1950-, author
Prentice-Hall, 1996
Buku Teks