Matras, Judah
Prentice-Hall, 1977
Buku Teks
Weeks, John R.
Wadsworth, 1986
Buku Teks
Demko, George J., author
McGraw-Hill, 1970
Buku Teks
edited by Douglas G. Chapman
International Co-operation Publishing House, 1981
Buku Teks
Saw, Swee-Hock, 1931-, author
Institute of South East Asia Studies, 2015
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