Andrain, Charles F., author
Macmillan, 1995
Buku Teks
edited by John A. Wiseman
Routledge, 1995
Buku Teks
Ampalavanar, Rajeswary, author
Oxford University Press, 1981
Buku Teks
Maeroff, Gene I., author
Palgrave Macmillan, 2006
Buku Teks
Nagazumi, Akira, author
Institute Of Developing Economies, 1972
Buku Teks